How to write the school canteen snack ranking questionnaire?

The purpose of the investigation should be clear.

Questionnaire survey on the ranking of snacks in school canteens, including dining environment, tableware hygiene, food quality, food price, food taste, food hygiene, food varieties and richness, as well as the reasons, categories and nutritional value of snacks.

The existence and development of student canteen is not only related to students' living problems, but also related to students' physical health and learning conditions.