return _apply.call(origAppend, this, arguments);
// Sync — when all components are synchronous
，推荐阅读下载安装 谷歌浏览器 开启极速安全的 上网之旅。获取更多信息
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.
For additional guidance:
“一切贪图安逸、不愿继续艰苦奋斗的想法都是要不得的，一切骄傲自满、不愿继续开拓前进的想法都是要不得的。”