diff --git a/app/static/config.yml b/app/static/config.yml
index 173bc6b..7e681fe 100644
--- a/app/static/config.yml
+++ b/app/static/config.yml
@@ -2,7 +2,7 @@
 css:
   item:
     - ../static/css/bootstrap.css
-
+    - ../static/css/highlighted.css
 # 全局引入的js文件地址
 js:
   head: # 在页面加载之前加载
diff --git a/app/static/css/highlighted.css b/app/static/css/highlighted.css
new file mode 100644
index 0000000..167f595
--- /dev/null
+++ b/app/static/css/highlighted.css
@@ -0,0 +1,5 @@
+
+.highlighted {
+    color: red;
+    font-weight: normal;
+}
\ No newline at end of file
diff --git a/app/static/js/fillword.js b/app/static/js/fillword.js
index b3a8b42..18461f0 100644
--- a/app/static/js/fillword.js
+++ b/app/static/js/fillword.js
@@ -1,5 +1,6 @@
-let isRead = true;
-let isChoose = true;
+// initialize from localStorage
+let isRead = localStorage.getItem('readChecked') !== 'false';  // default to true
+let isChoose = localStorage.getItem('chooseChecked') !== 'false';
 
 function getWord() {
     return window.getSelection ? window.getSelection() : document.selection.createRange().text;
@@ -11,6 +12,7 @@ function fillInWord() {
     if (!isChoose) return;
     const element = document.getElementById("selected-words");
     element.value = element.value + " " + word;
+    localStorage.setItem('selectedWords', element.value);
 }
 
 document.getElementById("text-content").addEventListener("click", fillInWord, false);
@@ -24,13 +26,15 @@ inputSlider.oninput = () => {
 
 function onReadClick() {
     isRead = !isRead;
+    localStorage.setItem('readChecked', isRead);
 }
 
 function onChooseClick() {
     isChoose = !isChoose;
+    localStorage.setItem('chooseChecked', isChoose);
 }
 
 // 如果网页刷新,停止播放声音
 if (performance.getEntriesByType("navigation")[0].type == "reload") {
     Reader.stopRead();
-}
\ No newline at end of file
+}
diff --git a/app/static/js/highlight.js b/app/static/js/highlight.js
index 76b4793..c9c3a02 100644
--- a/app/static/js/highlight.js
+++ b/app/static/js/highlight.js
@@ -1,4 +1,4 @@
-let isHighlight = true;
+let isHighlight = localStorage.getItem('highlightChecked') !== 'false'; // default to true
 
 function cancelBtnHandler() {
     cancelHighlighting();
@@ -39,15 +39,16 @@ function highLight() {
             }
             totalSet = new Set([...totalSet, ...matches]);
         }
-    } 
+    }
     // 删除所有的mark标签,防止标签发生嵌套
     articleContent = articleContent.replace(/<(mark)[^>]*>/gi, "");
     articleContent = articleContent.replace(/<(\/mark)[^>]*>/gi, "");
-    // 将文章中所有出现该单词word的地方改为:"<mark>" + word + "<mark>"。
+    // 将文章中所有出现该单词word的地方改为:"<span class='highlighted'>" + word + "</span>"。
     for (let word of totalSet) {
-        articleContent = articleContent.replace(new RegExp("\\b" + word + "\\b", "g"), "<mark>" + word + "</mark>");
+        articleContent = articleContent.replace(new RegExp("\\b" + word + "\\b", "g"), "<span class='highlighted'>" + word + "</span>");
     }
     document.getElementById("article").innerHTML = articleContent;
+
 }
 
 function cancelHighlighting() {
@@ -73,6 +74,7 @@ function toggleHighlighting() {
         isHighlight = true;
         highLight();
     }
+     localStorage.setItem('highlightChecked', isHighlight);
 }
 
 showBtnHandler();
\ No newline at end of file
diff --git a/app/templates/login.html b/app/templates/login.html
index b8eb118..b0806b6 100644
--- a/app/templates/login.html
+++ b/app/templates/login.html
@@ -15,6 +15,10 @@
             alert('输入不能为空!');
             return false;
         }
+        if (password.includes(' ')) {
+            alert('输入不能包含空格!');
+            return false;
+        }
         $.post(
             "/login", {'username': username, 'password': password},
             function (response) {
diff --git a/app/templates/mainpage_get.html b/app/templates/mainpage_get.html
index e96e8dc..3ba0ece 100644
--- a/app/templates/mainpage_get.html
+++ b/app/templates/mainpage_get.html
@@ -34,9 +34,9 @@
         <div class="alert alert-success" role="alert">共有文章 <span class="badge bg-success"> {{ number_of_essays }} </span> 篇</div>
         <p>粘贴1篇文章 (English only)</p>
         <form method="post" action="/">
-            <textarea name="content" rows="10" cols="120"></textarea><br/>
+            <textarea name="content" id="article" rows="10" cols="120"></textarea><br/>
             <input type="submit" value="get文章中的词频"/>
-            <input type="reset" value="清除"/>
+            <input type="reset" value="清除" onclick="clearArticle()"/>
         </form>
         {% if d_len > 0 %}
             <p><b>最常见的词</b></p>
@@ -53,5 +53,22 @@
             <script src="{{ js }}" ></script>
         {% endfor %}
     {% endif %}
+<script type="text/javascript">
+    // IIFE, avoid polluting the global scope
+    (function() {
+        const articleInput = document.querySelector('#article');
+        articleInput.value = localStorage.getItem('article') || '';
+
+        articleInput.addEventListener('input', function() {
+            localStorage.setItem('article', articleInput.value);
+        });
+
+        window.clearArticle = function() {
+            localStorage.removeItem('article');
+            articleInput.value = '';
+        };
+    })();
+
+</script>
 </body>
 </html>
diff --git a/app/templates/mainpage_post.html b/app/templates/mainpage_post.html
index 7357457..5df7dd5 100644
--- a/app/templates/mainpage_post.html
+++ b/app/templates/mainpage_post.html
@@ -2,7 +2,7 @@
 <html lang="en">
 <head>
     <meta charset="UTF-8">
-    <title>Title</title>
+    <title>单词词频</title>
 
     {{ yml['header'] | safe }}
     {% if yml['css']['item'] %}
diff --git a/app/templates/reset.html b/app/templates/reset.html
index 3425c97..408e001 100644
--- a/app/templates/reset.html
+++ b/app/templates/reset.html
@@ -12,6 +12,10 @@
                 alert('输入不能为空!');
                 return false;
             }
+            if (old_password.includes(' ') || new_password.includes(' ')) {
+                alert('输入不能包含空格!');
+                return false;
+            }
             if (new_password !== re_new_password) {
                 alert('新密码不匹配,请重新输入');
                 return false;
diff --git a/app/templates/signup.html b/app/templates/signup.html
index 5b3aafe..6b5db6e 100644
--- a/app/templates/signup.html
+++ b/app/templates/signup.html
@@ -16,6 +16,10 @@ You're logged in already! <a href="/logout">Logout</a>.
                 alert('输入不能为空!');
                 return false;
             }
+            if (password.includes(' ') || password2.includes(' ')) {
+                alert('输入不能包含空格!');
+                return false;
+            }
             if (password !== password2) {
                 alert('确认密码与输入密码不一致!');
                 return false;
diff --git a/app/templates/userpage_get.html b/app/templates/userpage_get.html
index 4e25725..243166f 100644
--- a/app/templates/userpage_get.html
+++ b/app/templates/userpage_get.html
@@ -86,7 +86,7 @@
             <div>
                 <p><small class="text-muted" id="source">{{ today_article['source'] }}</small></p><br/>
             </div>
-            
+
             <p><b id="question">{{ today_article['question'] }}</b></p><br/>
                 <script type="text/javascript">
                     function toggle_visibility(id) { {# https://css-tricks.com/snippets/javascript/showhide-element/#}
@@ -109,22 +109,22 @@
         </div>
     </div>
 
-    <input type="checkbox" onclick="toggleHighlighting()" checked/>生词高亮
-    <input type="checkbox" onclick="onReadClick()" checked/>大声朗读
-    <input type="checkbox" onclick="onChooseClick()" checked/>划词入库
+    <input type="checkbox" id="highlightCheckbox" onclick="toggleHighlighting()" />生词高亮
+    <input type="checkbox" id="readCheckbox" onclick="onReadClick()" />大声朗读
+    <input type="checkbox" id="chooseCheckbox" onclick="onChooseClick()" />划词入库
     <div class="range">
         <div class="field">
             <div class="sliderValue">
                 <span id="rangeValue">1×</span>
             </div>
-            <input type="range" id="rangeComponent" min="0.5" max="2" value="1" step="0.25"/>
+            <input type="range" id="rangeComponent" min="0.5" max="2" value="1" step="0.25" />
         </div>
     </div>
     <p><b>收集生词吧</b> (可以在正文中划词,也可以复制黏贴)</p>
     <form method="post" action="/{{ username }}/userpage">
         <textarea name="content" id="selected-words" rows="10" cols="120"></textarea><br/>
         <button class="btn btn-primary btn-lg" type="submit" onclick="Reader.stopRead()">把生词加入我的生词库</button>
-        <button class="btn btn-primary btn-lg" type="reset">清除</button>
+        <button class="btn btn-primary btn-lg" type="reset"  onclick="clearSelectedWords()">清除</button>
     </form>
     {% if session.get['thisWord'] %}
         <script type="text/javascript">
@@ -139,7 +139,7 @@
 
     {% if d_len > 0 %}
         <p>
-            <b>我的生词簿</b> 
+            <b>我的生词簿</b>
             <label for="move_dynamiclly">
                 <input type="checkbox" name="move_dynamiclly" id="move_dynamiclly" checked>
                 允许动态调整顺序
@@ -175,18 +175,60 @@
 <script type="text/javascript">
 
     window.onload = function () { // 页面加载时执行
+        const settings = {
+            // initialize settings from localStorage
+            highlightChecked: localStorage.getItem('highlightChecked') !== 'false', // localStorage stores strings, default to true. same below
+            readChecked: localStorage.getItem('readChecked') !== 'false',
+            chooseChecked: localStorage.getItem('chooseChecked') !== 'false',
+            rangeValue: localStorage.getItem('rangeValue') || '1',
+            selectedWords: localStorage.getItem('selectedWords') || ''
+        };
+
+        const elements = {
+            highlightCheckbox: document.querySelector('#highlightCheckbox'),
+            readCheckbox: document.querySelector('#readCheckbox'),
+            chooseCheckbox: document.querySelector('#chooseCheckbox'),
+            rangeComponent: document.querySelector('#rangeComponent'),
+            rangeValueDisplay: document.querySelector('#rangeValue'),
+            selectedWordsInput: document.querySelector('#selected-words')
+        };
+        // 应用设置到页面元素
+        elements.highlightCheckbox.checked = settings.highlightChecked;
+        elements.readCheckbox.checked = settings.readChecked;
+        elements.chooseCheckbox.checked = settings.chooseChecked;
+        elements.rangeComponent.value = settings.rangeValue;
+        elements.rangeValueDisplay.textContent = `${settings.rangeValue}x`;
+        elements.selectedWordsInput.value = settings.selectedWords;
+
         // 刷新页面或进入页面时判断,若不是首篇文章,则上一篇按钮可见
-        if(sessionStorage.getItem('pre_page_button')!="display" && sessionStorage.getItem('pre_page_button')){
+        if (sessionStorage.getItem('pre_page_button') !== 'display' && sessionStorage.getItem('pre_page_button')) {
             $('#load_pre_article').show();
         }
 
-        startTime=Date.now();//记录用户页面的初始时间
-        if(window.performance.navigation.type!=1){//将第一次加载页面时的文章id,level保存到本地
-             sessionStorage.setItem('article_id','{{today_article['article_id']}}');
-             sessionStorage.setItem('text_level','{{today_article['text_level']}}');
+        // 事件监听器
+        elements.selectedWordsInput.addEventListener('input', () => {
+            localStorage.setItem('selectedWords', elements.selectedWordsInput.value);
+        });
+
+        elements.rangeComponent.addEventListener('input', () => {
+            const rangeValue = elements.rangeComponent.value;
+            elements.rangeValueDisplay.textContent = `${rangeValue}x`;
+            localStorage.setItem('rangeValue', rangeValue);
+        });
+
+  	startTime=Date.now();//记录用户页面的初始时间
+       	if(window.performance.navigation.type!=1){//将第一次加载页面时的文章id,level保存到本地
+             	sessionStorage.setItem('article_id','{{today_article['article_id']}}');
+             	sessionStorage.setItem('text_level','{{today_article['text_level']}}');
         }
-        //
-     };
+    };
+
+    function clearSelectedWords() {
+        localStorage.removeItem('selectedWords');
+        document.querySelector('#selected-words').value = '';
+    }
+
+
     function load_next_article(){
         //在进入下一篇之前处理
         endTime=Date.now();//记录用户点击下一篇文章时的时间
diff --git a/app/templates/userpage_post.html b/app/templates/userpage_post.html
index a7ad569..94816c5 100644
--- a/app/templates/userpage_post.html
+++ b/app/templates/userpage_post.html
@@ -1,50 +1,50 @@
 <!DOCTYPE html>
 <html lang="en">
     <head>
-	<meta charset="UTF-8">
-	<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=0.5, maximum-scale=3.0, user-scalable=yes" />
-	<meta name="format-detection" content="telephone=no" />
+       <meta charset="UTF-8">
+       <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=0.5, maximum-scale=3.0, user-scalable=yes" />
+       <meta name="format-detection" content="telephone=no" />
 
-	{{ yml['header'] | safe }}
-	{% if yml['css']['item'] %}
-        {% for css in yml['css']['item'] %}
-        <link href="{{ css }}" rel="stylesheet">
-        {% endfor %}
-	{% endif %}
-	{% if yml['js']['head'] %}
-        {% for js in yml['js']['head'] %}
-        <script src="{{ js }}" ></script>
-        {% endfor %}
-	{% endif %}
+       {{ yml['header'] | safe }}
+       {% if yml['css']['item'] %}
+         {% for css in yml['css']['item'] %}
+         <link href="{{ css }}" rel="stylesheet">
+         {% endfor %}
+        {% endif %}
+        {% if yml['js']['head'] %}
+         {% for js in yml['js']['head'] %}
+         <script src="{{ js }}" ></script>
+         {% endfor %}
+        {% endif %}
 
-	<title>EnglishPal Study Room for {{username}}</title>
+       <title>EnglishPal Study Room for {{username}}</title>
     </head>
     <body>
-	<div class="container-fluid">
-	    <p class="mt-md-3">
-		<input type="button" id="btn-cancel-selection" value="取消勾选" onclick="toggleCheckboxSelection(false)" />
-		<input type="button" id="btn-selection" value="全部勾选" onclick="toggleCheckboxSelection(true)" />
-	    </p>
-	    <form method="post" action="/{{username}}/mark">
-		<button type="submit" name="add-btn" class="btn btn-outline-primary btn-lg">加入我的生词簿</button>
-		{% for x in lst %}
-		{% set word = x[0]%}
-		<p>
-		    <font color="grey">{{loop.index}}</font>
-		    :
-		    <a href='http://youdao.com/w/eng/{{word}}/#keyfrom=dict2.index' title={{word}}>{{word}}</a>
-		    ({{x[1]}})
-		    <input type="checkbox" name="marked" value="{{word}}" checked>
-		</p>
+      <div class="container-fluid">
+          <p class="mt-md-3">
+               <input type="button" id="btn-cancel-selection" value="取消勾选" onclick="toggleCheckboxSelection(false)" />
+               <input type="button" id="btn-selection" value="全部勾选" onclick="toggleCheckboxSelection(true)" />
+          </p>
+          <form method="post" action="/{{username}}/mark">
+              <button type="submit" name="add-btn" class="btn btn-outline-primary btn-lg" onclick="clearSelectedWords()">加入我的生词簿</button>
+              {% for x in lst %}
+              {% set word = x[0]%}
+              <p>
+                    <font color="grey">{{loop.index}}</font>
+                    :
+                    <a href='http://youdao.com/w/eng/{{word}}/#keyfrom=dict2.index' title={{word}}>{{word}}</a>
+                    ({{x[1]}})
+                    <input type="checkbox" name="marked" value="{{word}}" checked>
+              </p>
 
-		{% endfor %}
-	    </form>
-	    {{ yml['footer'] | safe }}
-	    {% if yml['js']['bottom'] %}
+               {% endfor %}
+           </form>
+           {{ yml['footer'] | safe }}
+           {% if yml['js']['bottom'] %}
             {% for js in yml['js']['bottom'] %}
-            <script src="{{ js }}" ></script>
+             <script src="{{ js }}" ></script>
             {% endfor %}
-	    {% endif %}
-	</div>
+        {% endif %}
+      </div>
     </body>
 </html>
diff --git a/app/test/test_bug528_tangjiao.py b/app/test/test_bug528_tangjiao.py
new file mode 100644
index 0000000..802423c
--- /dev/null
+++ b/app/test/test_bug528_tangjiao.py
@@ -0,0 +1,95 @@
+import pytest
+from selenium import webdriver
+from selenium.webdriver.common.by import By
+from selenium.webdriver.common.keys import Keys
+from selenium.webdriver.support.ui import WebDriverWait
+from selenium.webdriver.support import expected_conditions as EC
+from selenium.common.exceptions import NoSuchElementException, TimeoutException
+
+
+# 测试登录页面输入密码包含空格的情况
+def test_login_password_with_space(driver, URL):
+    try:
+        driver.get(URL+"/login")
+
+        # 输入用户名
+        username_elem = driver.find_element_by_id('username')
+        username_elem.send_keys("test_user")
+
+        # 输入包含空格的密码
+        password_elem = driver.find_element_by_id('password')
+        password_elem.send_keys("password with space")
+
+        # 提交登录表单
+        elem = driver.find_element_by_class_name('btn')  # 找到提交按钮
+        elem.click()
+
+        # 显式等待直到警告框出现
+        WebDriverWait(driver, 10).until(EC.alert_is_present())
+
+        # 检查是否弹出警告框
+        alert = driver.switch_to.alert
+        assert "输入不能包含空格!" in alert.text
+    except (NoSuchElementException, TimeoutException) as e:
+        pytest.fail("页面元素未找到或超时: {}".format(e))
+
+
+# 测试注册页面输入密码包含空格的情况
+
+def test_signup_password_with_space(driver, URL):
+    try:
+        driver.get(URL+"/signup")
+
+        # 输入用户名
+        username_elem = driver.find_element_by_id('username')
+        username_elem.send_keys("new_user")
+
+        # 输入包含空格的密码
+        password_elem = driver.find_element_by_id('password')
+        password_elem.send_keys("password with space")
+
+        # 再次输入密码
+        password2_elem = driver.find_element_by_id('password2')
+        password2_elem.send_keys("password with space")
+
+        # 提交注册表单
+        elem = driver.find_element_by_class_name('btn')  # 找到提交按钮
+        elem.click()
+
+        # 显式等待直到警告框出现
+        WebDriverWait(driver, 10).until(EC.alert_is_present())
+
+        # 检查是否弹出警告框
+        alert = driver.switch_to.alert
+        assert "输入不能包含空格!" in alert.text
+    except (NoSuchElementException, TimeoutException) as e:
+        pytest.fail("页面元素未找到或超时: {}".format(e))
+
+
+
+# 测试重设密码页面输入新密码包含空格的情况
+
+def test_reset_password_with_space(driver, URL):
+    try:
+        driver.get(URL+"/reset")
+
+        # 输入用户名
+        username_elem = driver.find_element_by_id('username')
+        username_elem.send_keys("test_user")
+
+        # 输入包含空格的密码
+        password_elem = driver.find_element_by_id('password')
+        password_elem.send_keys("password with space")
+
+        # 提交重设密码表单
+        elem = driver.find_element_by_class_name('btn')  # 找到提交按钮
+        elem.click()
+
+        # 显式等待直到警告框出现
+        WebDriverWait(driver, 10).until(EC.alert_is_present())
+
+        # 检查是否弹出警告框
+        alert = driver.switch_to.alert
+        assert "输入不能包含空格!" in alert.text
+    except (NoSuchElementException, TimeoutException) as e:
+        pytest.fail("页面元素未找到或超时: {}".format(e))
diff --git a/app/test/test_bug544_tangxinyuan.py b/app/test/test_bug544_tangxinyuan.py
new file mode 100644
index 0000000..43bfa8c
--- /dev/null
+++ b/app/test/test_bug544_tangxinyuan.py
@@ -0,0 +1,53 @@
+import random
+import string
+from selenium.webdriver.common.by import By
+from selenium.webdriver.support.ui import WebDriverWait
+from selenium.webdriver.support import expected_conditions as EC
+
+from helper import signup
+
+
+def has_punctuation(s):
+    return any(c in string.punctuation for c in s)
+
+
+def login(driver, home, uname, password):
+    driver.get(home)
+    WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.LINK_TEXT, '登录'))).click()
+    driver.find_element(By.ID, 'username').send_keys(uname)
+    driver.find_element(By.ID, 'password').send_keys(password)
+    driver.find_element(By.XPATH, '//button[text()="登录"]').click()
+    WebDriverWait(driver, 10).until(EC.title_is(f"EnglishPal Study Room for {uname}"))
+
+
+def select_valid_word(driver):
+    elem = driver.find_element(By.ID, 'text-content')
+    essay_content = elem.text
+    valid_word = random.choice([word for word in essay_content.split() if len(word) >= 6 and not has_punctuation(
+        word) and 'font>' not in word and 'br>' not in word and 'p>' not in word])
+    driver.find_element(By.ID, 'selected-words').send_keys(valid_word)
+    return valid_word
+
+
+def test_save_selected_word(driver, URL):
+    try:
+        username, password = signup(URL, driver)
+        word = select_valid_word(driver)
+        stored_words = driver.execute_script('return localStorage.getItem("selectedWords");')
+        assert word == stored_words, "Selected word not saved to localStorage correctly"
+        # 退出并重新登录以检查存储的单词
+        driver.find_element(By.LINK_TEXT, '退出').click()
+        driver.execute_script("window.open('');window.close();")
+
+        # 等待一会儿,让浏览器有足够的时间关闭标签页
+        WebDriverWait(driver, 2)
+
+        # 重新打开一个新的标签页
+        driver.execute_script("window.open('');")
+        driver.switch_to.window(driver.window_handles[-1])  # 切换到新打开的标签页
+
+        login(driver, URL, username, password)
+        textarea_content = driver.find_element(By.ID, 'selected-words').get_attribute('value')
+        assert word == textarea_content, "Selected word not preserved after re-login"
+    finally:
+        driver.quit()
diff --git a/app/test/test_bug551_DingZeYu.py b/app/test/test_bug551_DingZeYu.py
new file mode 100644
index 0000000..015fb5a
--- /dev/null
+++ b/app/test/test_bug551_DingZeYu.py
@@ -0,0 +1,37 @@
+import time
+import pytest
+from selenium import webdriver
+from selenium.webdriver import ActionChains
+from selenium.webdriver.common.by import By
+from selenium.webdriver.common.alert import Alert
+from selenium.webdriver.support import expected_conditions as EC
+from selenium.webdriver.support.wait import WebDriverWait
+from helper import signup
+
+def test_bug551(driver, URL):
+    driver.maximize_window()
+    driver.get(URL)
+
+    username, password = signup(URL, driver)
+
+    article = driver.find_element(By.ID, 'article')
+    actions = ActionChains(driver)
+
+    actions.move_to_element(article)
+    actions.click_and_hold()
+    actions.move_by_offset(450, 200)
+    actions.release()
+    actions.perform()
+
+    # 获取选中高亮部分的单词的元素
+    highlighted_words = driver.find_elements(By.CLASS_NAME, 'highlighted')
+
+    # 验证选中部分的单词是否同时应用了需求样式
+    expected_font_weight = "400"  
+
+    for word in highlighted_words:
+        font_weight = word.value_of_css_property("font-weight")
+        assert font_weight == expected_font_weight, f"选中部分的单词的字体样式错误"
+
+    time.sleep(5)
+    driver.quit()
diff --git a/app/test/test_bug553_LinShan.py b/app/test/test_bug553_LinShan.py
new file mode 100644
index 0000000..388f5da
--- /dev/null
+++ b/app/test/test_bug553_LinShan.py
@@ -0,0 +1,58 @@
+from selenium import webdriver
+from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
+from selenium.webdriver.support import expected_conditions as EC
+from selenium import webdriver
+from selenium.webdriver.support.wait import WebDriverWait
+from selenium.webdriver.common.by import By
+from selenium.webdriver.common.keys import Keys
+import logging
+import time
+import pytest
+
+@pytest.mark.parametrize("test_input,expected",
+                         [("‘test1’", "test1"),
+                          ("'test2'", "test2"),
+                          ("“test3”", "test3"),
+                          ("it's", "it's"),
+                          ("hello,I'm linshan", ["hello","i'm","linshan"]),
+                          ("Happy New Year!?", ["happy","new","year"]),
+                          ("My favorite book is 《Harry Potter》。", ["potter","harry","my","favorite","book","is"])])
+def test_bug553_LinShan(test_input,expected, driver, URL):
+    try:
+        # 打开对应地址的网页
+        driver.get(URL)
+
+        # 浏览器最大窗口化
+        driver.maximize_window()
+
+        # 判断网页源代码中是否有English Pal -文字
+        assert 'English Pal -' in driver.page_source
+
+        # 将测试的数据输入到主页的textarea里
+        driver.find_element_by_xpath("//textarea[@name='content']").send_keys(Keys.CONTROL, "a")
+        driver.find_element_by_xpath("//textarea[@name='content']").send_keys(test_input)
+        time.sleep(1)
+
+        # 点击按钮获取单词
+        driver.find_element_by_xpath("//input[@value='get文章中的词频']").click()
+        time.sleep(1)
+
+        # 获取筛选后的单词
+        words = driver.find_elements_by_xpath("//p/a")
+
+        # 遍历获取到的单词,并判断单词与预期的相同
+        for word in words:
+            # 判断单词是否在预期结果中
+            assert word.text in expected
+            
+        # 返回上一页网页
+        driver.find_element_by_xpath("//input[@value='确定并返回']").click()
+        time.sleep(0.1)
+
+    except Exception as e:
+        # 输出异常信息
+        logging.error(e)
+        # 关闭浏览器
+        driver.quit()
+    finally:
+        driver.quit()
diff --git a/app/wordfreqCMD.py b/app/wordfreqCMD.py
index dcee74e..feeafbd 100644
--- a/app/wordfreqCMD.py
+++ b/app/wordfreqCMD.py
@@ -4,6 +4,7 @@
 ###########################################################################
 
 import collections
+import html
 import string
 import operator
 import os, sys # 引入模块sys,因为我要用里面的sys.argv列表中的信息来读取命令行参数。
@@ -39,7 +40,8 @@ def file2str(fname):#文件转字符
 
 
 def remove_punctuation(s): # 这里是s是形参 (parameter)。函数被调用时才给s赋值。
-    special_characters = '\_©~<=>+/[]*&$%^@.,?!:;#()"“”—‘’{}|' # 把里面的字符都去掉
+    special_characters = '\_©~<=>+/[]*&$%^@.,?!:;#()"“”—‘’{}|,。?!¥……()、《》:;·' # 把里面的字符都去掉
+    s = html.unescape(s) # 将HTML实体转换为对应的字符,比如<会被识别为小于号
     for c in special_characters:
         s = s.replace(c, ' ') # 防止出现把 apple,apple 移掉逗号后变成 appleapple 情况
     s = s.replace('--', ' ')
@@ -104,7 +106,7 @@ if __name__ == '__main__':
         print('%s\t%d\t%s' % (x[0], x[1], youdao_link(x[0])))#函数导出
 
     # 把频率的结果放result.html中
-    make_html_page(sort_in_descending_order(L), 'result.html') 
+    make_html_page(sort_in_descending_order(L), 'result.html')
 
     print('\nHistory:\n')
     if os.path.exists('frequency.p'):
diff --git a/requirements.txt b/requirements.txt
index 4322f80..4b81c20 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,5 @@ PyYAML~=6.0
 pony==0.7.16
 snowballstemmer==2.2.0
 Werkzeug==2.2.2
+
+pytest~=8.1.1
\ No newline at end of file