string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%B3%A8%E4%BC%9A%E6%9C%89%E8%AE%A1%E7%AE%97%E9%A2%98%E5%90%97 => Failed to connect to 125.88.227.171 port 38062: Connection refused"
注会有计算题吗
