Limitations可以从几方面考虑： 资料方面，你所阐述的观点是based on a small sample 因而，你阐述的观点may have limited 同样，所用的资料可能偏重男性或老年人，所以，你的观点may be generalizable only to males or the 方法方面。Future Directions 就写你打算如何处理/解决前面提及的局限性。给你一个例句。The results of the study highlight the need for future research to use a more representative sample
Aging of the population is facing mankind in this century， a major Aging of the population has been increasing， on the pension insurance system will have a huge impact， aging of the population led to the rising cost of retirement to promote increasingly heavy burden of pension directly related to the pension insurance fund balance， leading to difficulties in the traditional pension The face of the arrival of old age social pension due to difficulties in practice this paper will investigate and businesses to practice the method of data access through urban enterprise staff on the current old-age insurance and reasons to form a basic understanding of， and make their own Strategies and perspectivesKeywords： Population aging Old-age insurance system Insurance Fund Workers
