string(292) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%80%83%E4%BA%8C%E7%BA%A7%E5%BB%BA%E9%80%A0%E5%B8%88%E7%9C%8B%E4%B8%80%E5%BB%BA%E7%9A%84%E4%B9%A6%E5%8F%AF%E4%BB%A5%E5%90%97 => Failed to connect to 14.116.215.7 port 38230: Connection refused"
考二级建造师看一建的书可以吗
