如何使用bootstrap将<a>标签放在卡片的右上角？

要将<a>标签放在Bootstrap卡片的右上角，你可以使用Bootstrap的布局工具类来实现。以下是一个示例代码：

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Bootstrap Card Example</title>
  <link href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css" rel="stylesheet">
  <style>
    .card-link {
      position: absolute;
      top: 10px;
      right: 10px;
    }
  </style>
</head>
<body>
  <div class="container mt-5">
    <div class="row">
      <div class="col-md-4">
        <div class="card">
          <img src="https://via.placeholder.com/300" class="card-img-top" alt="...">
          <div class="card-body">
            <h5 class="card-title">Card Title</h5>
            <p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
            <a href="#" class="btn btn-primary">Go somewhere</a>
            <a href="#" class="card-link">Link in top right corner</a>
          </div>
        </div>
      </div>
    </div>
  </div>

  <script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.5.4/dist/umd/popper.min.js"></script>
  <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
</body>
</html>