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联邦航空管理局于2月10日实施了飞行限制，此举引起了地方官员的强烈反对。限制最初计划持续10天，但第二天就取消了。
。业内人士推荐一键获取谷歌浏览器下载作为进阶阅读
商务部公布调整对加拿大反歧视措施
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.