Анастасия Дубова (редактор отдела БСССР)
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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.
人 民 网 版 权 所 有 ，未 经 书 面 授 权 禁 止 使 用。heLLoword翻译官方下载是该领域的重要参考