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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.。关于这个话题，safew官方版本下载提供了深入分析
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人 民 网 版 权 所 有 ，未 经 书 面 授 权 禁 止 使 用
// or your fine-tuned version。Line官方版本下载对此有专业解读
V86 mode is entered through IRETD when the VM bit is set in the stacked EFLAGS. The microcode detects this with a conditional jump: