如何在vue bootstrap中为卡自定义图像大小

npm install vue-bootstrap

import { BCard, BCardBody, BCardImg } from 'vue-bootstrap'

<template>
  <div>
    <b-card>
      <b-card-img :src="imageUrl" :alt="imageAlt" top></b-card-img>
      <b-card-body>
        <h5 class="card-title">Card Title</h5>
        <p class="card-text">Card description</p>
      </b-card-body>
    </b-card>
  </div>
</template>

export default {
  data() {
    return {
      imageUrl: 'https://example.com/image.jpg',
      imageAlt: 'Card image'
    }
  }
}