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.
时间回到2004年2月，主政一方的习近平同志参加中央党校省部级主要领导干部专题研究班。
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In addition, the Board of Directors holds a monthly video conference which lasts one hour and is open to the general public.