string(274) "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%E4%B8%AD%E5%AD%98%E5%9C%A8%E9%97%AE%E9%A2%98%E5%8F%8A%E8%A7%A3%E5%86%B3%E6%96%B9%E6%A1%88 => Failed to connect to 14.116.215.7 port 38225: Connection refused"
工作中存在问题及解决方案
