string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=37%E7%A0%81%E6%98%AF%E7%BE%8E%E5%9B%BD%E5%A4%9A%E5%B0%91%E5%90%97 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
37码是美国多少吗
