Real game engines use this pattern (or its 3D cousin, the Octree) for broad-phase collision detection: the quadtree quickly identifies candidate pairs, and a more expensive narrow-phase check tests the actual geometry.
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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。」