A quadtree does the same thing for two-dimensional space. It takes a rectangular region and divides it into four equal quadrants: northwest, northeast, southwest, southeast. If a quadrant has too many points in it, it subdivides again and again. Each subdivision creates smaller and smaller cells where points are densely packed.
Платон Щукин (Редактор отдела «Экономика»)，更多细节参见Safew下载
Раскрыты подробности похищения ребенка в Смоленске09:27。关于这个话题，heLLoword翻译官方下载提供了深入分析
Цены на нефть взлетели до максимума за полгода17:55，详情可参考爱思助手下载最新版本