George Lusty, director of enforcement at Ofcom, said it had "been clear" adult sites needed to deploy robust age checks to protect children in the UK form seeing porn.
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，这一点在safew官方版本下载中也有详细论述
2.最近一年销售收入在5000万元至2亿元（含）的企业，比例不低于4%。
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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