他又站了起来，似乎试图重新瞄准，但再次中枪倒地。
A better streams API is possible
。业内人士推荐WPS下载最新地址作为进阶阅读
Real-world failures
The spatial view (the grid of rectangles) and the tree view (the hierarchy of nodes) represent the same structure. Searching for a point means walking down the tree: at each node, you check which of the four children contains your target coordinate and recurse into that child. You never visit the other three.
break; // 找到插入位置