How to write the preface of the social practice paper on small household appliances maintenance?

There are several ways to write the preface of the social practice paper on small household appliances maintenance:

First, specify the reason or purpose, time and place, object or scope, process and method, and personnel composition of the investigation itself, and draw the central question or basic conclusion from it;

The second is to state the historical background, development survey, actual situation, main achievements, outstanding problems and other basic situations of the respondents, and then put forward the central issues or main viewpoints;

The third is to come straight to the point and directly summarize the survey results, such as affirming the practice, pointing out the problems, prompting the impact, and explaining the central content. The preface plays the role of making the finishing point, and it should be concise and to the point.

2. theme. This is the most important part of the investigation report, which introduces in detail the basic situation, practice and experience of the investigation and research, as well as various specific understandings, viewpoints and basic conclusions obtained from the analysis of the materials obtained from the investigation and research.

3. It's over. There are also many ways to write the ending, which can put forward methods and countermeasures to solve the problem or suggestions for improving the work in the next step; Or summarize the main points of the full text and further deepen the theme; Or ask questions to arouse people's further thinking; Or look to the future and send out encouragement and call.