The algorithm maintains a running "best distance" that starts at infinity. As it walks the tree, it checks each visited point and updates the best distance if it finds something closer. Before recursing into a child node, it checks whether the closest possible point in that child's bounding box is farther than the current best. If so, the entire subtree gets pruned.
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。业内人士推荐搜狗输入法下载作为进阶阅读
準備在4月初接待特朗普的中國正在「對裁決的內容和影響進行全面評估」。
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Wright's visit came shortly after Venezuela's National Assembly passed a law to allow both private and foreign investment in its oil industry, following two decades of tight state control.