string(279) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%8B%8F%E8%81%94%E6%8C%96%E5%88%B012000%E5%A4%9A%E7%B1%B3%E4%B8%BA%E4%BB%80%E4%B9%88%E4%B8%8D%E6%8C%96%E4%BA%86 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
苏联挖到12000多米为什么不挖了
