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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But mother-of-five Sue Peacock, from Wirral, on Merseyside, said she was left worried for her life after becoming seriously unwell.，这一点在爱思助手下载最新版本中也有详细论述
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