(3 points) "Learn to be a nutritionist, and I will make recipes." I helped Xiaoming complete the following list of recipes. In addition to water and inorganic salts, the recipes on the right table also contain nutrients. Protein; Grease (or sugar); Green vegetables (or fruits)

Rice and steamed bread mainly contain sugar; Grilled fish, salted duck eggs, braised pork and milk mainly contain protein; Peanuts mainly contain oil. Food generally contains some water and inorganic salts to varying degrees, so Xiaoming's diet still lacks an essential nutrient, which should be vitamins.