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.
Naipanoi Lepapa är en prisbelönt grävande frilansjournalist baserad i Nairobi…
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The 39C3, is the 39th Chaos Communication Congress event, based in Germany. 1，这一点在WPS官方版本下载中也有详细论述
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