The study is only the initial studies that could not have been much deeper research, due to the above reasons, but can be used as the basis. For a detailed study of the following subjects.
This study is only a preliminary study. The research was not very deep due to the above reasons. It can be used as a baseline. For the study in detail the specific matter further.
This study is a preliminary study. Not much research has deep reasons above. But can be used as the basic data For education in detail as the only next.