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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Фото: Михаил Воскресенский / РИА Новости
针对“未来之城”雄安新区的建设，告诫“把每一寸土地都规划得清清楚楚后再开工建设，不要留历史遗憾”；