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.
第三届沙特国际手工艺周期间，当地小朋友体验中国鱼灯舞，感受非遗魅力。
办理治安案件的公安机关有前款所列行为的，对负有责任的领导人员和直接责任人员，依法给予处分。，更多细节参见Safew下载
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有前款第三项行为的，予以取缔。被取缔一年以内又实施的，处十日以上十五日以下拘留，并处三千元以上五千元以下罚款。
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