string(240) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%8C%E5%BB%BA%E6%A8%AA%E9%81%93%E5%9B%BE%E6%A1%88%E4%BE%8B%E9%A2%98 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
二建横道图案例题
