现行《高新技术企业认定管理办法》（2016 年版）对研发投入占比的要求是：
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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不得不说，在堆配置这一块，零跑还是一如既往地狠。