为什么要花几百上千亿买“备胎”？因为英伟达的垄断溢价，已经让这些硅谷巨头感到了切肤之痛。
The pruned nodes (in red) represent entire regions of space that the algorithm never examines. The points inside those regions are never checked. Compare the "Nodes Visited" count to the total number of points. The quadtree is doing far less work than a brute-force scan.，这一点在Line官方版本下载中也有详细论述
Despite medics thinking the 56-year-old would almost certainly die, she left Ward 9 at Moseley Hall in Birmingham on Wednesday, receiving a hero's welcome from her family in Penn, on the Wolverhampton/Staffordshire border.，更多细节参见safew官方版本下载
* @param n 数组长度