The spines of sea urchins can generate a voltage when water moves around them — a phenomenon that could be used to design underwater flow sensors.
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// console.log(spanner.next(80)); // 输出1（正确）
async pull(controller: ReadableByteStreamController) {，更多细节参见heLLoword翻译官方下载
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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.