請教該如何用正則把a標簽的 < " >換成@ # $，而不影響a href的鏈接和其他標簽不允許單獨把a標簽提取出來替換<div>     <div class="bt">2222</div>     <ul>         <li>1</li>         <li>2</li>     </ul>     <a href="https://segmentfault.com">ok</a></div>結果：    <div>         <div class="bt">2222</div>         <ul>             <li>1</li>             <li>2</li>         </ul>         @a href=# https://segmentfault.com # $ ok @/a$         @a href=# https://segmentfault.com # $ acb @/a$         @a href=# https://segmentfault.com # $ 123 @/a$     </div>