就在几年前，这片土地上还是另一番景象。2018年，达博从美国回到冈比亚，子承父业，投身农业，却遭遇“迎头痛击”。“我空有一腔热情，但对水稻种植一窍不通。一开始，杂草比稻苗还高，灌溉靠天，收割靠手。虽然投入巨大，收获却寥寥无几。”达博说。
Every point gets examined, regardless of where it sits. Points on the opposite side of the map get the same treatment as points right next to the query region. We're doing a lot of unnecessary work.
，这一点在爱思助手下载最新版本中也有详细论述
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.
Nature, Published online: 25 February 2026; doi:10.1038/s41586-026-10217-z
# Inject at runtime, never store on disk