作为中国西式快餐领域中的领先品牌，麦当劳和肯德基的市场策略，也就是当下市场风向的指引。
$39.99 $19.99 at Target，这一点在快连下载安装中也有详细论述
For well-distributed points, nearest neighbor search is often near O(logn)O(\log n)O(logn) in practice. In the worst case (all points clustered tightly or along a line), it can degrade to O(n)O(n)O(n), but this is uncommon with typical spatial data.。同城约会是该领域的重要参考
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