string(257) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B9%B2%E4%BB%80%E4%B9%88%E5%89%AF%E4%B8%9A%E6%AF%94%E8%BE%83%E5%A5%BD%E5%AD%A6%E4%BA%9B => Failed to connect to 101.91.112.32 port 38221: Connection refused"
干什么副业比较好学些
