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The algorithm walks the tree recursively. At each node, it checks: does this node's bounding box overlap with the query rectangle? If not, the entire subtree gets pruned (skipped). If it does overlap, it tests the node's points against the query and recurses into the children.
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Wes Streeting, Health Secretary in England, says he wants screening in place but only if it's "backed by evidence".
大富豪夜总会门前的印度阿差哥。这张脸曾是大富豪的一张名片（图：南方人物周刊记者 方迎忠）
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