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Point lookups are useful, but the operation you'll reach for more often is a range query: give the tree a rectangular region and retrieve every point inside it, without scanning the entire dataset.
，这一点在同城约会中也有详细论述
图/下沉市场中常用充电方式及用户比例
Surface-to-air missiles, which are capable of shooting down aircraft and ballistic missiles, will be located on Yonaguni, Japan’s westernmost island