string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%AA%E4%BA%BAip%E8%AE%BA%E6%96%87%E5%8F%82%E8%80%83%E6%96%87%E7%8C%AE => Failed to connect to 14.18.117.71 port 38164: Connection refused"
个人ip论文参考文献
