string(274) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%9D%A2%E8%AF%95%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98%E9%97%AE%E7%AD%94%E9%A2%98%E5%8F%8A%E7%AD%94%E6%A1%88 => Failed to connect to 14.18.117.71 port 38164: Connection refused"
面试常见问题问答题及答案
