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.
第一百二十二条 对被决定给予行政拘留处罚的人，由作出决定的公安机关送拘留所执行；执行期满，拘留所应当按时解除拘留，发给解除拘留证明书。。搜狗输入法2026对此有专业解读
themselves. SRI and, later, their chosen manufacturing partner General Electric，这一点在同城约会中也有详细论述
圖像來源，BBC Chinese / Lok Lee