string(267) "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%E4%BB%8E%E5%93%AA%E4%B9%B0%E6%AF%94%E8%BE%83%E5%A5%BD%E5%91%A2 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
网上买书从哪买比较好呢
