string(306) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%A1%A8%E6%A0%BC%E8%AF%AF%E4%BF%9D%E5%AD%98%2C%E6%80%8E%E4%B9%88%E9%80%80%E5%9B%9E%E4%B8%8A%E6%AC%A1%E4%BF%9D%E5%AD%98%E5%86%85%E5%AE%B9 => Failed to connect to 125.88.227.171 port 38062: Connection refused"
表格误保存,怎么退回上次保存内容
