第四十六条 发生核事故时，有关单位和个人必须立即采取应急措施，并按照有关法律、行政法规的规定报告，禁止缓报、瞒报、谎报核事故。
Source: Computational Materials Science, Volume 267
。关于这个话题，91视频提供了深入分析
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Notice how the highlighted region shrinks at each step. The algorithm never examines points outside the narrowing window. In a balanced tree with nnn points, this takes about log4(n)\log_4(n)log4(n) steps. For a million points, that's roughly 10 steps instead of a million comparisons.