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But like most in the industry, Pierce would like to offer one hand, flexible enough to do everything.
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But she still has them, as well as autism and learning difficulties.
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.