整理后润色一下： 首先，现实条件的制约让样本代表性不足。本研究的调查对象数量较少，样本随机性不够，样本存在着时间上、空间上的限制因素，那么样本的代表性也就不足，为此期望未来能在时间充裕、人力资源丰富等基础上争取扩大调研对象的覆盖面，让研究结果更具参考价值。

Firstly, the constraints of realistic conditions make the sample not representative enough. The sample size of this study is small, and the randomness of the sample is insufficient. There are time and space limitations on the sample, which results in a lack of representativeness. Therefore, in the future, with sufficient time and abundant human resources, we hope to expand the coverage of research objects and make the study results more valuable for reference.