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%95%99%E6%9D%90%E6%94%B9%E7%89%88%E4%BA%86%E5%90%97 => Failed to connect to 125.88.227.171 port 38114: Connection refused"
二建教材改版了吗
