你想要健康吗?那么,你首先要正确认识人体。这不仅是医学的主要课题,也是大众所关心的问题。众所周知,自然界中的物质是由原子构成的。人体也是由原子构成的,主要是碳(C)、氢(H)、氧(O)、氮(N)等原子。这些原子组成了分子及大分子(如水、DNA、蛋白质、糖类、脂肪等),它们又组成了细胞器(如线粒 Do you want to be healthy? Well, you must first understand the human body correctly. This is not only a major issue for medicine but also a matter of public concern. It is well known that the matter in nature consists of atoms. The human body is also composed of atoms, mainly carbon (C), hydrogen (H), oxygen (O), nitrogen (N) and other atoms. These atoms make up molecules and macromolecules (such as water, DNA, proteins, sugars, fats, etc.), which in turn form organelles (such as mitochondria