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k--; // 剩余删除名额减1（关键：控制删除位数，保证保留足够长度）
，详情可参考体育直播
ВсеПолитикаОбществоПроисшествияКонфликтыПреступность。WPS官方版本下载对此有专业解读
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.，更多细节参见safew官方下载