according to the national institutes of health, the recommended daily dietary allowance of vitamin c for adults 19 years and older is 90 mg daily for men and 75 mg for women.most people think of citruses, especially oranges, when it comes to vitamin c, but plenty of vegetables have high amounts of it too.
答案：根据美国国立清洁研讨院（national institutes of health）的数据，主张19岁及以上的成年人每天摄入维生素c，男性为90毫克，女人为75毫克。说到维生素c，大大都人都会想到柑橘，特别是橙子，但很
多蔬菜的维生素c含量也很高。