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.
在這些地方，男男愛情作品愛好者能接觸到多樣化的「自選式」情感故事：純潔的校園少年情誼、傳奇武俠對手之間的深層情感，或是追尋幸福結局的幻想題材角色。
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往后四十余年的时间证明，这是一个有点奢侈的愿望。即使亲生母亲就在十五公里外的隔壁镇。阿爸的生母在他的童年里几乎空白，直到2015年前后她去世。阿爸对她的印象，也只是卖甜粿的，村里人都叫她“阿英”。