Community Guidelines
圖像來源，China News Service，详情可参考搜狗输入法下载
The quadtree is the two-dimensional case of a broader family of space-partitioning data structures. Octrees extend the same idea to three dimensions (splitting cubes into eight children), KD-trees use alternating axis-aligned splits (splitting along x, then y, then x again), and R-trees group nearby objects into bounding rectangles. Each variant makes different tradeoffs between construction time, query speed, and update cost.，更多细节参见91视频
Continue reading...。关于这个话题，一键获取谷歌浏览器下载提供了深入分析