string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%8E%B0%E5%9C%A8%E5%93%AA%E7%A7%8D%E8%A1%8C%E4%B8%9A%E5%89%8D%E6%99%AF%E5%A5%BD => Failed to connect to 101.89.143.195 port 38175: Connection refused"
现在哪种行业前景好
