string(267) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%88%98%E5%9B%BD%E9%94%8B%E8%80%81%E5%B8%88%E6%B3%A8%E4%BC%9A%E8%AE%B2%E7%9A%84%E5%A5%BD%E5%90%97 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
刘国锋老师注会讲的好吗
