string(258) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%B9%B0%E4%B9%A6%E5%8E%BB%E4%BB%80%E4%B9%88%E7%BD%91%E7%AB%99%E6%9C%80%E5%A5%BD%E5%91%A2 => Failed to connect to 101.89.117.144 port 38005: Connection refused"
买书去什么网站最好呢
