string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%8E%E4%B9%88%E6%8F%90%E9%AB%98%E7%BD%91%E7%AB%99%E4%B8%8B%E8%BD%BD%E9%80%9F%E5%BA%A6 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
怎么提高网站下载速度
