string(283) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%A6%82%E4%BD%95%E6%9B%B4%E5%A5%BD%E7%9A%84%E6%8E%A8%E5%B9%BF%E8%87%AA%E5%B7%B1%E7%9A%84%E4%BA%A7%E5%93%81%E5%91%A2 => Failed to connect to 14.18.117.71 port 38133: Connection refused"
如何更好的推广自己的产品呢
