Раскрыты подробности похищения ребенка в Смоленске09:27
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.
，更多细节参见旺商聊官方下载
+ free $100 Amazon gift card。safew官方版本下载对此有专业解读
FT Magazines, including HTSI