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.
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Филолог заявил о массовой отмене обращения на «вы» с большой буквы09:36，这一点在旺商聊官方下载中也有详细论述
时至今日，一段对话仍传递着穿透人心的力量。。搜狗输入法下载对此有专业解读