Grapefruit
葡萄柚
Grapefruits have a good amount of vitamin C. But science has yet to prove that you can easily get enough vitamin C through foods alone, without supplementation, to help treat cold and flu. However, grapefruit is packed with flavonoids -- natural chemical compounds that have been found to increase immune system activation. Dislike grapefruits? Try oranges or tangerines.
葡萄柚含有大量的维C,但是科研人员还无法证实在感冒时,人体仅靠食物就能获得足量的维C来对抗感冒。但是,葡萄柚富含一种天然的具有增强免疫力的化合物,类黄酮。如果不喜欢葡萄柚,可以试试桔子或橘子。