string(273) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E5%BB%BA%E6%A1%88%E4%BE%8B%E5%88%86%E6%9E%90%E9%A2%98%E7%9A%84%E7%AD%94%E9%A2%98%E6%8A%80%E5%B7%A7 => Failed to connect to 14.18.46.51 port 38206: Connection refused"
一建案例分析题的答题技巧
