string(274) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B8%80%E7%BA%A7%E5%BB%BA%E9%80%A0%E5%B8%88%E6%95%99%E6%9D%90%E7%B2%BE%E8%AE%B2%E5%A4%AA%E5%A4%9A%E4%BA%86 => Failed to connect to 14.116.215.7 port 38225: Connection refused"
一级建造师教材精讲太多了
