The spatial view (the grid of rectangles) and the tree view (the hierarchy of nodes) represent the same structure. Searching for a point means walking down the tree: at each node, you check which of the four children contains your target coordinate and recurse into that child. You never visit the other three.
SelectWhat's included
,详情可参考快连下载安装
‘The worst outcome’: Green triumph creates new peril for Labour。业内人士推荐safew官方下载作为进阶阅读
入园前,我们就教过她数数、背古诗。相对于数数,她更喜欢背古诗,虽然整首诗能背下来,但总是记不住诗名和作者,有时候还会背混了,不过这都不重要,她能记住就好。