如果A1单元格为入职日期，B1单元格中结束日期，则在B1单元格内输入：
=IF(TODAY()>DATE(YEAR(A1),MONTH(A1)+3,DAY(A1)),DATE(YEAR(A1),MONTH(A1)+6,DAY(A1)),DATE(YEAR(A1),MONTH(A1)+3,DAY(A1)))
