string(311) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=excel%E9%94%99%E8%AF%AF%E4%BF%9D%E5%AD%98%E5%90%8E%2C%E5%A6%82%E4%BD%95%E6%81%A2%E5%A4%8D%E4%BF%9D%E5%AD%98%E5%89%8D%E7%9A%84%E6%96%87%E4%BB%B6 => Failed to connect to 101.89.117.144 port 38076: Connection refused"
excel错误保存后,如何恢复保存前的文件
