This is the same idea behind binary search. In a sorted array, you compare against the middle element and eliminate half the remaining candidates. In a quadtree, you choose one of four quadrants and ignore the other three regions. Each level narrows the search space by a factor of four instead of two.
高价水果的“身价”有其成因。要么是育种、培育技术限制了种植面积、亩产量；要么是依赖进口，附带更高的物流、关税成本。本身具有“稀缺性”，加之悦己消费、情绪消费渐成风尚，一些消费者不仅为产品本身付费，也为新奇体验和社交分享买单，造成了价格上涨。
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Фото: Maxim Shemetov / Reuters
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免去蒋成华的第十四届全国人民代表大会外事委员会委员职务。，详情可参考Line官方版本下载
The National Farmers Union (NFU) wrote to MPs in November last year to lay out the severe risks the farming sector was facing.