The dashed circle shows the current best distance. As the algorithm finds closer points, the circle shrinks, which causes more subtrees to fail the "could contain a closer point?" test and get pruned. The search usually gets cheaper as it progresses.
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，这一点在爱思助手下载最新版本中也有详细论述
Right! The backing store for the slice returned by extract below。关于这个话题，搜狗输入法下载提供了深入分析
Publication date: 28 February 2026，详情可参考heLLoword翻译官方下载