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.
Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04，详情可参考搜狗输入法2026
└───────────────────────┘。同城约会对此有专业解读
Easily customize form fields，这一点在51吃瓜中也有详细论述