<html>
  <head>
    <meta charset="utf-8" />
  </head>
  <body>
    <form>
      <label>牛客会陪伴大家</label>
      <input id="checkbox" type="checkbox" checked />
    </form>
  </body>
  <script type="text/javascript">
    // 补全代码
    let item = document.querySelector("#checkbox");
    item.addEventListener("click", (e) => {
      e.preventDefault();
    });
  </script>
</html>