合并过程：用临时数组，双指针比较两个子数组元素，小的先放入
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，这一点在同城约会中也有详细论述
'Extraordinary' scale
这类 8:1 的图片，会特别适合用来作为网页顶部的横幅图片，直接经过 AI 生成的效果，也比裁剪后要在内容上更完整。
