string(267) "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%80%8E%E4%B9%88%E7%9C%8B%E4%B9%A6%E6%AF%94%E8%BE%83%E6%9C%89%E6%95%88%E7%8E%87 => Failed to connect to 101.89.159.206 port 38100: Connection refused"
二建怎么看书比较有效率
