This is the same idea behind binary search. In a sorted array, you compare against the middle element and eliminate half the remaining candidates. In a quadtree, you choose one of four quadrants and ignore the other three regions. Each level narrows the search space by a factor of four instead of two.
В Финляндии предупредили об опасном шаге ЕС против России09:28
。关于这个话题，Line官方版本下载提供了深入分析
└─ Privilege Drop，更多细节参见爱思助手下载最新版本
Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04。搜狗输入法下载是该领域的重要参考
Keys that have a warning icon, meaning they are set to unrestricted