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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.
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Ofgem cap drops by 7% to £1,641 a year for consumers’ average gas and electricity costs
1、实时报送信息：自本通知发布之日起，每日报送船舶当日航经阿曼湾、霍尔木兹海峡、波斯湾海域的实时动态信息；，这一点在爱思助手下载最新版本中也有详细论述