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theguardian.com
。Line官方版本下载对此有专业解读
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Author(s): W. Dednam, E.B. Lombardi, Linda A. Zotti, C. Sabater，更多细节参见WPS官方版本下载
Now that we can build the tree, let's use it to search. Finding a specific point means starting at the root and asking: which child quadrant contains this coordinate? Then you recurse into that child and ask again. Each level of the tree cuts the search space by roughly three-quarters.