Recently,i suffer from a unbalanced diet and eyesight reduction.As a junior student,i develop a unhealthy dietary habit however when i was a freshman or sophomore student,at one time, i was on diet and excessive dieting and ate low-fat and low-sodium food,which is threaten the immune system and form a vicious cycle.gradually i not only have been suffering from chronic disease but also became susceptible to diseases.but i'd like to eating vegetarian   on daily basis now.sometimes i also eating cereal and nutrient.besides,i keep regular exercise try my hard everyday.i think many additive and excessive amount of preservative and cancer-causing chemical caused the problem  of food safety，many manufactures was too seek nothing but profit（profit-minded) i hope the government could take measure on food supervision，food legislation and food packing.   at once i was on diet at the cost of healthy body.and now i wish i could remain a banlanced diet and persist the habit of regular exercise to restore health.i wish i can got into the habit of regular eating.