// 核心逻辑：只有当前时间 栈顶时间 → 无法合并，是新车队（push）
Source: Computational Materials Science, Volume 266
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"A lot of things have to be scrapped completely and rebuilt from the ground up," she tells the BBC. "In fact, if political constraints did not matter, the best thing to do would be to scrap PDVSA, but that isn't going to happen.
The grid lines on the visualization represent a tree structure underneath. Every region is a node. When a node splits, it creates four children. The root node covers the entire space. Leaf nodes (nodes with no children) hold the actual points.