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.
Peter GillibrandBBC Newsbeat。关于这个话题，safew官方下载提供了深入分析
might think. But first, we have to understand where ATMs came from. We'll start。关于这个话题，Line官方版本下载提供了深入分析
"""数据实体类 - 封装抓取结果"""