string(274) "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%E9%BB%84%E6%B4%81%E6%B4%B5%E5%92%8C%E8%8B%8F%E8%8B%8F%E8%B0%81%E8%AE%B2%E5%BE%97%E5%A5%BD => Failed to connect to 14.18.117.71 port 38133: Connection refused"
注会黄洁洵和苏苏谁讲得好
