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.
Easy-to-use app available on all major devices including iPhone, Android, Windows, Mac, and more
，更多细节参见safew官方版本下载
ВСУ запустили «Фламинго» вглубь России. В Москве заявили, что это британские ракеты с украинскими шильдиками16:45
widely used in the market, and are suitable for a variety of applications. Some
。同城约会是该领域的重要参考
Christine Cox MBE, from Wolverhampton, has been a campaigner around organ donation for more than 35 years.，详情可参考同城约会
第四十七条 有下列行为之一的，处十日以上十五日以下拘留，并处一千元以上二千元以下罚款；情节较轻的，处五日以上十日以下拘留，并处一千元以下罚款：