编辑同志:我女儿身体素质不大好,今年又要小学升初中,学习压力大,经常感冒。我想给她买点营养品补一补,增强她的免疫力。我看市场上五花八门的补品都标明有增强免疫力的功效,怕吃多了反而不好。请问,免疫力越强越好吗?怎么增强人的免疫力才科学?读者吴秋琳 Editor’s Comrade: My daughter’s physical fitness is not very good, but also primary and junior high school this year, learning pressure, often cold. I want to give her some nutrition supplements, enhance her immunity. I see on the market a wide variety of supplements are marked with the effect of enhancing immunity, fear of eating more but not good. Excuse me, the stronger the immune system, the better? How to enhance the human immunity to science? Reader Wu Qiulin