string(258) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%AD%E7%BA%A7%E5%AE%9E%E5%8A%A1%E5%81%9A%E9%A2%98%E8%BF%98%E6%98%AF%E4%B8%8D%E4%BC%9A => Failed to connect to 101.89.143.195 port 38205: Connection refused"
中级实务做题还是不会
