The pruned nodes (in red) represent entire regions of space that the algorithm never examines. The points inside those regions are never checked. Compare the "Nodes Visited" count to the total number of points. The quadtree is doing far less work than a brute-force scan.
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When Rebekah Lee was in her twenties, she decided to embark on an ambitious climb up Mount Stuart in Washington State and "made a series of bad decisions".，推荐阅读谷歌浏览器【最新下载地址】获取更多信息
1. 建堆：将数组构建成大顶堆（父节点 = 子节点），更多细节参见WPS下载最新地址