正则表达式提取含%符号（如100%）文本的前后上下文（HTML预处理后）

• Use number signs (#) for headings.
• Start list items with dashes (-).
• Wrap text with asterisks (*) to emphasize it (e.g., emphasized content).
• Surround code snippets or commands with backticks (`) (e.g., python script.py).
• Use greater than signs (>) for quoted text (e.g., > This is a quoted paragraph).
• Format links as [display text](target URL) (e.g., Project Repository).
• Format images as [alt text](image URL) (e.g., Mountain Landscape).

内容的提问来源于stack exchange，提问作者Craig