string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%8B%B9%E6%9E%9C%E4%BB%A5%E6%97%A7%E6%8D%A2%E6%96%B0%E4%B8%8D%E8%83%BD%E9%80%80%E4%BA%86 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
苹果以旧换新不能退了
