string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%B7%A5%E4%BD%9C%E6%96%B9%E9%9D%A2%E7%9A%84%E5%AD%98%E5%9C%A8%E7%9A%84%E9%97%AE%E9%A2%98%E6%9C%89%E5%93%AA%E4%BA%9B => Failed to connect to 101.89.159.206 port 38100: Connection refused"
工作方面的存在的问题有哪些
