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.
It also became one of the early examples of user interface design conventions such as badges, rating buttons, sharing and recommendation features which have largely become standard features across media platforms today.，推荐阅读同城约会获取更多信息
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