// Flush: yield any remaining data
Reese Witherspoon is supposed to be proof that the “follow your dreams” directive works: She’s an Oscar-winning actress with a hit production company, a $400-million-plus net worth, and a Nashville mansion.。关于这个话题，Line官方版本下载提供了深入分析
，这一点在WPS官方版本下载中也有详细论述
use int if you have a small number of classes,
A quadtree does the same thing for two-dimensional space. It takes a rectangular region and divides it into four equal quadrants: northwest, northeast, southwest, southeast. If a quadrant has too many points in it, it subdivides again and again. Each subdivision creates smaller and smaller cells where points are densely packed.，更多细节参见夫子
abort(reason) { closed = true; chunks.length = 0; },