Methods: 90 male Sprague-Dawley (SD) rats, aged three months, were randomly divided into three groups: control group (n=30), model group (n=30), treatment group (n=30).

• 方法:雄性3月龄SD大鼠90只,随机分为对照组(30只)、模型组(30只)和预防组(30只)。