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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.
，推荐阅读雷电模拟器官方版本下载获取更多信息
法国世界报周四表示，德国总理默茨此次访问杭州，绝非偶然，因为，杭州已经成为了中国数字革命的心脏城市。。关于这个话题，Line官方版本下载提供了深入分析
输入：num = "1432219", k = 3