diff --git a/app/static/js/fillword.js b/app/static/js/fillword.js
index 18461f0..8172622 100644
--- a/app/static/js/fillword.js
+++ b/app/static/js/fillword.js
@@ -1,6 +1,5 @@
-// initialize from localStorage
-let isRead = localStorage.getItem('readChecked') !== 'false';  // default to true
-let isChoose = localStorage.getItem('chooseChecked') !== 'false';
+let isRead = true;
+let isChoose = true;
 
 function getWord() {
     return window.getSelection ? window.getSelection() : document.selection.createRange().text;
@@ -11,8 +10,13 @@ function fillInWord() {
     if (isRead) Reader.read(word, inputSlider.value);
     if (!isChoose) return;
     const element = document.getElementById("selected-words");
+    let element1 = document.getElementById("selected-words");
+    let index = (String)(element1.value).indexOf(word);
+    localStorage.setItem("nowWord",element1.value);
+    if(index === -1){
+        element1.value = element1.value + " " + word;
+    }
     element.value = element.value + " " + word;
-    localStorage.setItem('selectedWords', element.value);
 }
 
 document.getElementById("text-content").addEventListener("click", fillInWord, false);
@@ -26,15 +30,8 @@ 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();
 }
diff --git a/app/static/js/highlight.js b/app/static/js/highlight.js
index e8a3cf8..0cea31a 100644
--- a/app/static/js/highlight.js
+++ b/app/static/js/highlight.js
@@ -1,4 +1,4 @@
-let isHighlight = localStorage.getItem('highlightChecked') !== 'false'; // default to true
+let isHighlight = true;
 
 function cancelBtnHandler() {
     cancelHighlighting();
@@ -22,38 +22,62 @@ function getWord() {
 
 function highLight() {
     if (!isHighlight) return;
-    let articleContent = document.getElementById("article").innerHTML; // innerHTML保留HTML标签来保持部分格式，且适配不同的浏览器
+    let articleContent = document.getElementById("article").innerText; //将原来的.innerText改为.innerHtml，使用innerText会把原文章中所包含的<br>标签去除，导致处理后的文章内容失去了原来的格式
     let pickedWords = document.getElementById("selected-words");  // words picked to the text area
     let dictionaryWords = document.getElementById("selected-words2"); // words appearing in the user's new words list
-    let allWords = dictionaryWords === null ? pickedWords.value + " " : pickedWords.value + " " + dictionaryWords.value;
-    const list = allWords.split(" "); // 将所有的生词放入一个list中
-    let totalSet = new Set();
-    for (let i = 0; i < list.length; ++i) {
-        list[i] = list[i].replace(/(^\W*)|(\W*$)/g, ""); // 消除单词两边的非单词字符
-        if (list[i] != "" && !totalSet.has(list[i])) {
-            // 返回所有匹配单词的集合, 正则表达式RegExp()中, "\b"匹配一个单词的边界, g 表示全局匹配, i 表示对大小写不敏感。
-            let matches = new Set(articleContent.match(new RegExp("\\b" + list[i] + "\\b", "gi")));
-            if (matches.has("mark")) {
-                // 优先处理单词为 "mark" 的情况
-                totalSet = new Set(["mark", ...totalSet]);
-            }
-            totalSet = new Set([...totalSet, ...matches]);
-        }
+    let allWords = "";  //初始化allWords的值，避免进入判断后编译器认为allWords未初始化的问题
+    if(dictionaryWords != null){//增加一个判断，检查生词本里面是否为空，如果为空，allWords只添加选中的单词
+        allWords = pickedWords.value + " " + dictionaryWords.value;
     }
-    // 删除所有的mark标签,防止标签发生嵌套
-    articleContent = articleContent.replace(/<(mark)[^>]*>/gi, "");
-    articleContent = articleContent.replace(/<(\/mark)[^>]*>/gi, "");
-    // 将文章中所有出现该单词word的地方改为："<mark>" + word + "<mark>"。
-    for (let word of totalSet) {
-        articleContent = articleContent.replace(new RegExp("\\b" + word + "\\b", "g"), "<mark>" + word + "</mark>");
+    else{
+        allWords = pickedWords.value + " ";
+    }
+    const list = allWords.split(" ");//将所有的生词放入一个list中，用于后续处理
+    for (let i = 0; i < list.length; ++i) {
+        list[i] = list[i].replace(/(^\s*)|(\s*$)/g, ""); //消除单词两边的空字符
+        list[i] = list[i].replace('|', "");
+        list[i] = list[i].replace('?', "");
+        if (list[i] !== "" && "<mark>".indexOf(list[i]) === -1 && "</mark>".indexOf(list[i]) === -1) {
+           //将文章中所有出现该单词word的地方改为："<mark>" + word + "<mark>"。 正则表达式RegExp()中，"\\b"代表单词边界匹配。
+
+            //修改代码
+            let articleContent_fb = articleContent;  //文章副本
+            while(articleContent_fb.toLowerCase().indexOf(list[i].toLowerCase()) !== -1 && list[i]!=""){
+                //找到副本中和list[i]匹配的第一个单词(第一种匹配情况),并赋值给list[i]。
+                const index = articleContent_fb.toLowerCase().indexOf(list[i].toLowerCase());
+                list[i] = articleContent_fb.substring(index, index + list[i].length);
+
+                articleContent_fb = articleContent_fb.substring(index + list[i].length);    // 使用副本中list[i]之后的子串替换掉副本
+                articleContent = articleContent.replace(new RegExp("\\b"+list[i]+"\\b","g"),"<mark>" + list[i] + "</mark>");
+            }
+        }
     }
     document.getElementById("article").innerHTML = articleContent;
 }
 
 function cancelHighlighting() {
-    let articleContent = document.getElementById("article").innerHTML;
-    articleContent = articleContent.replace(/<(mark)[^>]*>/gi, "");
-    articleContent = articleContent.replace(/<(\/mark)[^>]*>/gi, "");
+    let articleContent = document.getElementById("article").innerText;//将原来的.innerText改为.innerHtml，原因同上
+    let pickedWords = document.getElementById("selected-words");
+    const dictionaryWords = document.getElementById("selected-words2");    
+    const list = pickedWords.value.split(" ");    
+    if (pickedWords != null) {
+        for (let i = 0; i < list.length; ++i) {
+            list[i] = list[i].replace(/(^\s*)|(\s*$)/g, "");
+            if (list[i] !== "") { //原来判断的代码中，替换的内容为“list[i]”这个字符串，这明显是错误的，我们需要替换的是list[i]里的内容
+                articleContent = articleContent.replace(new RegExp("<mark>"+list[i]+"</mark>", "g"), list[i]);
+            }
+        }
+    }
+    if (dictionaryWords != null) {
+        let list2 = pickedWords.value.split(" ");
+        for (let i = 0; i < list2.length; ++i) {
+            list2 = dictionaryWords.value.split(" ");
+            list2[i] = list2[i].replace(/(^\s*)|(\s*$)/g, "");
+            if (list2[i] !== "") { //原来代码中，替换的内容为“list[i]”这个字符串，这明显是错误的，我们需要替换的是list[i]里的内容
+                articleContent = articleContent.replace(new RegExp("<mark>"+list2[i]+"</mark>", "g"), list2[i]);
+            }
+        }
+    }
     document.getElementById("article").innerHTML = articleContent;
 }
 
@@ -73,7 +97,6 @@ function toggleHighlighting() {
         isHighlight = true;
         highLight();
     }
-     localStorage.setItem('highlightChecked', isHighlight);
 }
 
-showBtnHandler();
\ No newline at end of file
+showBtnHandler();
diff --git a/app/test/test_bug545_huanghuiling.py b/app/test/test_bug545_huanghuiling.py
new file mode 100644
index 0000000..5d7f88b
--- /dev/null
+++ b/app/test/test_bug545_huanghuiling.py
@@ -0,0 +1,87 @@
+# 用于模拟read方法
+class Reader:
+    @staticmethod
+    def read(word, value):
+        print(f"Reading word '{word}' with slider value {value}")
+
+
+is_read = True
+is_choose = True
+
+
+# 模拟获取用户选中的单词
+def get_word():
+    return "selected word"
+
+
+# 模拟fillInWord函数的行为
+def fill_in_word():
+    word = get_word()
+    if is_read:
+        Reader.read(word, 5)
+    if not is_choose:
+        return
+        # 模拟selected-words元素
+    selected_words = "previous word "
+    index = selected_words.find(word)
+    print(f"Current selected words: {selected_words}")
+    # 假设的localStorage实现
+    local_storage = {}
+
+    if index == -1:
+        selected_words += word + " "
+        local_storage["nowWord"] = selected_words
+        print(f"Added word to selected words: {selected_words}")
+    else:
+        print(f"Word '{word}' is already in selected words.")
+
+        # 打印模拟的localStorage内容
+    print(f"Local storage: {local_storage}")
+
+
+# 假设的slider和rangeValue元素
+slider_value = "5×"
+input_slider_value = 5
+
+
+# 模拟slider的oninput事件
+def on_slider_input(value):
+    global slider_value
+    slider_value = str(value) + '×'
+    print(f"Slider value changed to: {slider_value}")
+
+
+# 模拟按钮点击事件来切换is_read和is_choose的值
+def on_read_click():
+    global is_read
+    is_read = not is_read
+    print(f"Reading is now {'enabled' if is_read else 'disabled'}")
+
+
+def on_choose_click():
+    global is_choose
+    is_choose = not is_choose
+    print(f"Choosing is now {'enabled' if is_choose else 'disabled'}")
+
+
+# 假设的功能测试
+def run_functional_test():
+    print("\nRunning functional test...")
+
+    # 模拟用户点击操作，调用fill_in_word函数
+    fill_in_word()
+
+    # 模拟用户移动滑块，调用on_slider_input函数
+    on_slider_input(7)
+
+    # 模拟用户点击“Read”按钮，切换is_read状态
+    on_read_click()
+    fill_in_word()  # 再次调用fill_in_word来测试is_read的变化
+
+    # 模拟用户点击“Choose”按钮，切换is_choose状态
+    on_choose_click()
+    fill_in_word()  # 再次调用fill_in_word来测试is_choose的变化
+
+
+# 运行功能测试
+run_functional_test()