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.
В России ответили на имитирующие высадку на Украине учения НАТО18:04
。业内人士推荐safew官方版本下载作为进阶阅读
Continue reading...
Paul Hennesy/Anadolu via Getty Images
车企们的脚步比预想中走的更快。