// document_start means these listeners are in place before any element exists
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對華逆差超千億美元，默茨首次訪華能否反轉中德「零和」競爭？。业内人士推荐51吃瓜作为进阶阅读
The algorithm also visits children in order of distance to the query point. This means it checks the most promising quadrants first, which tends to find a good candidate early and enables aggressive pruning of the remaining quadrants. Without this ordering, the algorithm would still produce the correct result, but it would prune fewer nodes.
still around, although declining in use, in the 1970s. The 3612 had a slot on