text += dec.decode(chunk, { stream: true });
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// 测试用例（验证你的代码正确性，可自行删除/保留）
The efficiency depends on the query size relative to the data distribution. A small query in a sparse region prunes almost everything. A query that covers the whole space prunes nothing (because every node overlaps), degenerating to a brute-force scan. The quadtree gives you the most benefit when your queries are spatially local, which is exactly the common case for map applications, game physics, and spatial databases.。业内人士推荐im钱包官方下载作为进阶阅读