string(258) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%8A%E5%AD%A6%E6%9C%89%E7%94%A8%E8%BF%98%E6%98%AF%E6%B2%A1%E6%9C%89%E7%94%A8%E5%95%8A => Failed to connect to 101.89.159.206 port 38087: Connection refused"
上学有用还是没有用啊
