string(274) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%A5%BF%E8%97%8F%E7%9F%BF%E4%B8%9A%E4%B8%BB%E8%A6%81%E6%98%AF%E5%BC%80%E9%87%87%E4%BB%80%E4%B9%88%E7%9F%BF => Failed to connect to 61.171.74.35 port 38027: Connection refused"
西藏矿业主要是开采什么矿
