string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%B2%9C%E8%8A%B1%E4%BF%9D%E5%AD%98%E6%8C%81%E4%B9%85%E7%9A%84%E6%96%B9%E6%B3%95 => Failed to connect to 14.116.215.7 port 38225: Connection refused"
鲜花保存持久的方法
