string(274) "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%E6%8A%A5%E7%8F%AD%E8%BF%98%E6%98%AF%E8%87%AA%E5%AD%A6%E6%AF%94%E8%BE%83%E5%A5%BD => Failed to connect to 14.116.215.7 port 38225: Connection refused"
注安师报班还是自学比较好
