return urls, next_url
要理解虚拟线程，得先知道我们以前用的“平台线程”（操作系统线程）是咋回事。
。关于这个话题，夫子提供了深入分析
Ultrahuman is expanding its health monitoring ecosystem with the launch of a new flagship smart ring and a "biointelligence AI" platform upgrade. The Ring Pro is Ultrahuman's third-generation smart ring, and promises up to 15 days of battery life before needing to recharge, alongside 250 days of on-device health history storage.
BRT — 11 a.m.
第三十四条 单位以承包、承租、挂靠方式经营，承包人、承租人、挂靠人以发包人、出租人、被挂靠人名义对外经营并由发包人、出租人、被挂靠人承担相关法律责任的，发包人、出租人、被挂靠人为纳税人；其他情形下，承包人、承租人、挂靠人为纳税人。