男性和女性在生理结构上有明确的性别差异,表现在具有不同生殖系统、体貌性征(胡须、乳房等)和不同的免疫能力等方面。比如,有研究证明,女性免疫力比男性强。从发育上,女孩早于男孩,所以小学儿童中女孩的成绩往往优于男孩,但到中学以后,男孩会逐渐追上,甚至超过女孩。 Males and females have a clear gender difference in their physiological structure, manifested in different reproductive systems, physical signs (beards, breasts, etc.) and different immune abilities. For example, studies have shown that women have stronger immunity than men. In terms of development, girls are older than boys. Therefore, girls in elementary schools tend to outperform boys, but after middle school, boys will gradually catch up to even exceed girls.