string(301) "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%E4%B8%AD%E4%B8%80%E4%BA%9B%E5%B8%B8%E8%A7%81%E7%9A%84%E9%97%AE%E7%AD%94%E6%9C%89%E5%93%AA%E4%BA%9B%E6%96%B9%E5%BC%8F => Failed to connect to 14.18.117.71 port 38069: Connection refused"
面试中一些常见的问答有哪些方式
