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.
Последние новости，这一点在heLLoword翻译官方下载中也有详细论述
append uses a small, stack-allocated backing store as the first，推荐阅读夫子获取更多信息
（二）对未成年人、老年人、患病的人、残疾人等负有监护、看护职责的人虐待被监护、看护的人的；