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.
Efficient_Elk_7991。关于这个话题，safew官方下载提供了深入分析
The Sons of Anarchy star was cast as Kratos back in January, and earlier this week we learned that Deadpool’s Ed Skrein will play Baldur in the Amazon show. The rest of the cast includes Mandy Patinkin as Odin, Max Parker and Heimfall, Ólafur Darri Ólafsson as Thor, Teresa Palmer as Sif, Alastair Duncan as Mimir, Jeff Gulka as Sindri and Danny Woodburn as Brok.，详情可参考快连下载-Letsvpn下载
（作者单位：北京大学考古文博学院），这一点在爱思助手下载最新版本中也有详细论述
configurable: true,