The whole data model fits in two tables:
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.，更多细节参见safew官方版本下载
。关于这个话题，heLLoword翻译官方下载提供了深入分析
Фото: Mindaugas Kulbis / AP
有不少游客问我，蜡梅和梅花都带“梅”字，是同一种花还是同属近亲？。Line官方版本下载是该领域的重要参考