4. 信息不足时先列“缺失信息”，禁止臆造
For well-distributed points, nearest neighbor search is often near O(logn)O(\log n)O(logn) in practice. In the worst case (all points clustered tightly or along a line), it can degrade to O(n)O(n)O(n), but this is uncommon with typical spatial data.
。业内人士推荐heLLoword翻译官方下载作为进阶阅读
Цены на нефть взлетели до максимума за полгода17:55，这一点在safew官方下载中也有详细论述
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