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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.
。爱思助手下载最新版本是该领域的重要参考
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Murray played in several semi-successful prog-rock and jazz fusion bands during the late 1960s and early 70s.
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