string(284) "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%E5%AE%98%E6%96%B9%E6%95%99%E6%9D%90%E4%B8%BA%E5%95%A5%E5%88%B0%E7%AC%AC%E4%B8%89%E7%89%88%E6%B2%A1%E6%9C%89%E4%BA%86 => Received HTTP code 403 from proxy after CONNECT"
一建官方教材为啥到第三版没有了
