优化：随机选基准避免最坏情况 O(n²)
Unions argue that "one day less" can be good for energy, productivity and society, and that normalising four‑day patterns can keep people in work who might otherwise drop out altogether.。业内人士推荐爱思助手下载最新版本作为进阶阅读
，详情可参考51吃瓜
await dropOld.writer.write(chunk3); // ok, chunk1 discarded。关于这个话题，搜狗输入法2026提供了深入分析
Streaming costs could change