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.
为什么要花几百上千亿买“备胎”？因为英伟达的垄断溢价，已经让这些硅谷巨头感到了切肤之痛。
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Her parents believe it has helped reduce the severity of frequent seizures which led to many ambulance trips to A&E.
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