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Что думаешь? Оцени!
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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.，这一点在heLLoword翻译官方下载中也有详细论述
William Harwood
至于头发是什么时候掉光的，我不太清楚。阿爸自己也记不清了，只是说在外面的饭店吃多了鸡精，早早秃了头。