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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My approach is very simple:，这一点在heLLoword翻译官方下载中也有详细论述
Weathering challenges，详情可参考搜狗输入法2026