string(240) "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%E8%AF%95%E9%A2%98%E7%9C%9F%E5%AE%9E%E9%9A%BE%E5%BA%A6 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
注会试题真实难度
