string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E5%AE%89%E5%B8%88%E5%93%AA%E9%97%A8%E8%AF%BE%E7%AE%80%E5%8D%95 => Failed to connect to 101.89.166.210 port 38089: Connection refused"
注安师哪门课简单
