string(301) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%9C%A8%E7%BD%91%E4%B8%8A%E4%B9%B0%E4%B9%A6%E5%BB%BA%E8%AE%AE%E5%9C%A8%E5%93%AA%E4%B8%AA%E7%BD%91%E7%AB%99%E4%B8%8A%E8%B4%AD%E4%B9%B0 => Failed to connect to 218.78.59.96 port 38042: Connection refused"
在网上买书建议在哪个网站上购买
