The Netherlands has the highest share of part‑time workers in the OECD, with almost half of employees working less than full time.
银发经济：人口结构变迁下的十二万亿蓝海
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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.
做到实事求是，离不开调查研究这个基本功。