奶奶膝下三个儿子，过年是一大家子聚得最齐的节日。爷爷在世时，坚持在家围炉，由各家轮流做东，每三年轮一回，直到爷爷离世，这个传统仍保留了六七年。
5 MacOS-like Linux distros that can rescue your old Intel Mac before support ends。业内人士推荐51吃瓜作为进阶阅读
compareCount++;，这一点在safew官方下载中也有详细论述
The tree starts as a single region covering the whole space. As points arrive, they get dropped into the region that contains them. When a region exceeds its capacity (the maximum number of points it can hold before splitting), the region divides into four children, and the existing points get redistributed.