The efficiency depends on the query size relative to the data distribution. A small query in a sparse region prunes almost everything. A query that covers the whole space prunes nothing (because every node overlaps), degenerating to a brute-force scan. The quadtree gives you the most benefit when your queries are spatially local, which is exactly the common case for map applications, game physics, and spatial databases.
q = x @ self.wq
。关于这个话题，heLLoword翻译官方下载提供了深入分析
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（七）涉及本社区居民利益、居民普遍关心的其他事项。。同城约会是该领域的重要参考
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