做文字工作或经常操作电脑的人容易视力下降。维生素A可预防此症。每星期吃三根胡萝卜,即可保持体内维生素A的正常含量。整天呆在办公室日晒的机会少,易缺乏维生素D而患骨质疏松,需多吃海鱼、鸡肝等富含维生素D的食物。职业不同,营养需求也有差异,每种食物所含的营养素不相同, People who do text work or who often operate computers tend to have decreased eyesight. Vitamin A can prevent this disease. Eat three carrots a week, you can maintain the normal content of vitamin A in the body. Stay in the office all day less sun exposure, easy to lack of vitamin D and suffering from osteoporosis, need to eat more fish, chicken liver and other foods rich in vitamin D. Different occupations, nutritional needs are also different, each containing different nutrients in food,