与其说是技术问题，不如说是一个被长期忽视的基础工程问题。
What is the UK Covid inquiry and how does it work?
。爱思助手下载最新版本对此有专业解读
“昨天的要坚持下去，今天的要有所深化，明天的要取得更大成效”。不做寅吃卯粮、击鼓传花的虚浮之举，而是“甘于做铺垫性的工作，甘于抓未成之事”。
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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