string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%A0%B9%E6%8D%AE%E5%A6%82%E4%BD%95%E5%88%9B%E4%B8%9A%E5%86%99%E4%B8%80%E6%AE%B5%E8%AF%9D => Failed to connect to 14.18.117.71 port 38133: Connection refused"
根据如何创业写一段话
