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type: 'Command',，详情可参考51吃瓜
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.。下载安装 谷歌浏览器 开启极速安全的 上网之旅。是该领域的重要参考
Meanwhile, she fears competition from the ranks of newly unemployed government workers.