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在指导学生使用PowerBuilder工具和ASA数据库开发的学生成绩管理系统中，面向的用户人群主要是系统管理员、教师、学生和普通访客，这时管理者最为关心的问题之一是如何灵活地、动态地管理不同角色的不同操作权限，这一问题的解决影响到一个系统的成败,本文给出了操作权限的一种解决方案．     

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During the next 25 years, the growth and vitality of the American Statistical Association will depend on how well we attract and serve members in emerging areas of practice such as data science, where statistics as a skill set is in high demand but statistics as a profession has low recognition. Successful adaptation to the era of Big Data requires that we broaden our understanding of statistical practice to include the work of all those who learn from data. In order to grow the next generation of members, we must also retain a much higher proportion of today's student members, many of whom leave the ASA upon graduation. By providing value that meets the needs of these groups and equips them to flourish in their organizations, we can become the Big Tent for Statistics.