// 栈空 → 无更大元素，返回-1；栈非空 → 取栈顶（第一个更大值）
This is the same idea behind binary search. In a sorted array, you compare against the middle element and eliminate half the remaining candidates. In a quadtree, you choose one of four quadrants and ignore the other three regions. Each level narrows the search space by a factor of four instead of two.
，这一点在WPS下载最新地址中也有详细论述
再直白点，就是你买回去要么自己跟维京重新谈，要么自己重做一套系统——成本？时间？自己掂量。，这一点在同城约会中也有详细论述
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