代码示例:(标识:bs_card_image)
<!DOCTYPE html>
<html lang="en">
<head>
  <title>Bootstrap 实例</title>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/5.1.2/css/bootstrap.min.css" rel="stylesheet">
  <script src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/5.1.2/js/bootstrap.min.js"></script>
</head>
<body>

<div class="p-4">
  <h2>卡片图像</h2>
  <p>图像在上方 (card-img-top):</p>
  <div class="card" style="width:400px">
    <img class="card-img-top" src="/static/demo/images/avatar.png" alt="Card image" style="width:100%">
    <div class="card-body">
      <h4 class="card-title">Bill Gates</h4>
      <p class="card-text">Bill Gates 是一位程序员和工程师。一些示例文本。一些示例文本。</p>
      <a href="#" class="btn btn-primary">查看个人资料</a>
    </div>
  </div>
  <br>
  
  <p>图像在下方 (card-img-bottom):</p>
  <div class="card" style="width:400px">
    <div class="card-body">
      <h4 class="card-title">Steve Jobs</h4>
      <p class="card-text">Steve Jobs 是一位程序员和工程师。一些示例文本。一些示例文本。</p>
      <a href="#" class="btn btn-primary">查看个人资料</a>
    </div>
    <img class="card-img-bottom" src="/static/demo/images/avatar.png" alt="Card image" style="width:100%">
  </div>
</div>

</body>
</html>
运行结果: