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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.，推荐阅读雷电模拟器官方版本下载获取更多信息
（六）扰乱大型群众性活动秩序的其他行为。。旺商聊官方下载是该领域的重要参考
particularly surprised by the outcome, the 2984 was always a "request quotation"