Range queries ask "what's inside this box?" But sometimes the question is "what's nearest to this location?" This is the nearest neighbor problem, and you don't know how big your search radius should be. The nearest point might be right next to you or far away.
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patterns. Each path from the root of such a trie to an accepting state。业内人士推荐搜狗输入法2026作为进阶阅读
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