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.
第十六条 年满十八周岁的居民，不分民族、种族、性别、职业、家庭出身、宗教信仰、教育程度、财产状况、居住期限，都有选举权和被选举权；但是，依照法律被剥夺政治权利的人除外。。Line官方版本下载对此有专业解读
。关于这个话题，51吃瓜提供了深入分析
Plugs into your marketing technology stack and can be used across diverse media outlets, including email, content, paid media, and mobile
Litmaps (What is Litmaps?)，更多细节参见服务器推荐