make a complaint about canteen's service There are some significant sanitary problems that we must pay much attention to, such as the unhealthy food, and the uncomfortable environment. All of this have a remarkable influence on students’ health. For instance, when I was walking around and searching for a meal at yesterday noon, I noticed that many foods were just exposed on the air in our canteen instead of taking adequate protective measures. In addition, our dining table are not as clean as we expect and some disgusting things have always been left without any cleaning.