考试前,学生们大都处于紧张状态,此时脑力劳动强度大,学习时间长,常常会出现精力不足、精神难以集中,甚至头昏脑胀、复习效率不高等现象,因而学生除了保证睡眠、休息,消除紧张心理外,还应注意营养。 一、多吃蔬果 蔬菜、水果中含有丰富的矿物质、微量元素(如钙、磷、铁、锌等),对脑神经组织细胞的更新、供氧和代谢具有重要作用;纤维素、果酸有利排便,可预防因脑力紧张而出现的便秘 Before the exam, most students were in a state of tension. At this time, they had a lot of mental labor, long learning hours, lack of energy, difficulty in concentration, even dizziness and poor review efficiency. As a result, students not only guaranteed sleep and rest , Eliminate tension, but also should pay attention to nutrition. First, eat more fruits and vegetables, fruits are rich in minerals, trace elements (such as calcium, phosphorus, iron, zinc, etc.) on the regeneration of brain tissue cells, oxygen and metabolism play an important role; cellulose, Beneficial defecation, can prevent constipation due to mental stress