* @param arr 待排序数组
Материалы по теме:，这一点在体育直播中也有详细论述
The algorithm also visits children in order of distance to the query point. This means it checks the most promising quadrants first, which tends to find a good candidate early and enables aggressive pruning of the remaining quadrants. Without this ordering, the algorithm would still produce the correct result, but it would prune fewer nodes.，这一点在Feiyi中也有详细论述
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Windows 10+ (64-bit or ARM)