string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%AD%A6%E9%9C%B8%E7%AC%94%E8%AE%B0%E8%BF%99%E5%A5%97%E4%B9%A6%E6%80%8E%E4%B9%88%E6%A0%B7 => Failed to connect to 61.171.74.35 port 38041: Connection refused"
学霸笔记这套书怎么样
