string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%B4%A2%E7%BB%8F%E4%B8%93%E4%B8%9A%E6%9C%89%E5%89%8D%E9%80%94%E5%90%97%E7%9F%A5%E4%B9%8E => Failed to connect to 14.18.117.71 port 38133: Connection refused"
财经专业有前途吗知乎
