[동아시론/김영식]주취 난동 면책 끊어야 치안 골든타임이 산다
第十一条 对在原子能研究、开发和利用活动中做出突出贡献的单位和个人，按照国家有关规定给予表彰、奖励。
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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.