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.
Медведев вышел в финал турнира в Дубае17:59
FirstFT: the day's biggest stories。关于这个话题，同城约会提供了深入分析
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What is this page?。快连下载安装是该领域的重要参考
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