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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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郭鳳儀（Anna Kwok）得知父親因國家安全罪名在香港被捕時，她感到震驚，但她說：「同時也有一種預感，知道這一天遲早會來。」