海星游艇的突破性意义，不只是卖出几艘船，而是在高端制造领域建立“品牌溢价”的可能性，这恰恰是中国制造长期最稀缺的能力。
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.
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