diff --git a/sync.py b/sync.py
index 7d02a89..cf189ad 100644
--- a/sync.py
+++ b/sync.py
@@ -990,7 +990,8 @@ def create_diff_html(title, en_diff, en_old_lines, en_new_lines, cn_content=None
                 change_block_id += 1
 
                 # 添加变更块到导航列表
-                preview_text = additions_list[0][:50] + "..." if len(additions_list[0]) > 50 else additions_list[0]
+                first_content = additions_list[0].get('content', '') if additions_list else ''
+                preview_text = first_content[:50] + "..." if len(first_content) > 50 else first_content
                 change_blocks.append({
                     'id': change_block_id,
                     'line': i,
@@ -999,7 +1000,7 @@ def create_diff_html(title, en_diff, en_old_lines, en_new_lines, cn_content=None
                     'count': len(additions_list)
                 })
 
-                for idx, addition_content in enumerate(additions_list):
+                for idx, addition_item in enumerate(additions_list):
                     html += f'<div class="line-wrapper blank-placeholder change-block" data-change-id="{change_block_id}">'
                     html += '<div class="main-line">'
                     html += '<span class="line-number">&nbsp;</span>'  # 不显示行号
@@ -1007,6 +1008,7 @@ def create_diff_html(title, en_diff, en_old_lines, en_new_lines, cn_content=None
                     html += '</div>'
 
                     # 为空白行添加对应的新增批注
+                    addition_content = addition_item.get('content', '')  # 只取内容字段
                     escaped_addition = html_escape(addition_content)
                     html += '<div class="annotation">'
                     html += f'<div class="annotation-item added">'