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第四十九条 纳税人适用退（免）税的出口业务，可以放弃退（免）税，选择免征增值税或者缴纳增值税，自放弃退（免）税之日次月起，适用退（免）税的出口业务免征增值税或者按规定缴纳增值税。
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Unconsumed bodies: Pull semantics mean nothing happens until you iterate. No hidden resource retention. If you don't consume a stream, there's no background machinery holding connections open.
The spatial view (the grid of rectangles) and the tree view (the hierarchy of nodes) represent the same structure. Searching for a point means walking down the tree: at each node, you check which of the four children contains your target coordinate and recurse into that child. You never visit the other three.
A spokesman for the Covid inquiry said: "The inquiry is unlike any previous public inquiry. It was given a very broad scope because it is investigating multiple aspects of a pandemic that affected everyone in society."