{"text_format":"3","workbook":"xls","n_sheets":1,"sheets":["test"],"read":"whole","date_system":"1900","formulas":"cached_only"}

{"sheet":"test","index":0,"n_rows":3,"n_cols":5,"rows_kept":3,"flags":["formulas_cached_only"]}
["姓名","员工号","日期","签到时间","签退时间"]
["李义@Z001@P","Z001","2016/01/01","08:39","17:20"]
["李义@Z001@P","Z001","2016/01/02","10:12","17:20"]