string(248) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%91%E4%B8%8A%E4%B9%B0%E4%B9%A6%E5%9C%A8%E5%93%AA%E6%AF%94%E8%BE%83%E5%A5%BD => Failed to connect to 101.89.120.29 port 38104: Connection refused"
网上买书在哪比较好
