人的身体无论是皮肤、肌肉、骨胳、内脏都含有很多水分,约占体重的65%左右。它在体内起调节体温、输送营养、溶解废物并使其排出体外等作用。一个健康成人每日需要摄取2～5公斤的水。摄取量和排出体外的量近似于相等,保持着身体水分的平衡。当劳动强度增加或天气炎热时,人体需水量还要增加。体内水分一旦失去平衡,就会影响健康,甚至危 The human body, whether skin, muscle, bone, internal organs contain a lot of water, accounting for about 65% of body weight. It plays the role of regulating body temperature, transporting nutrients, dissolving waste and excreting it in the body. A healthy adult daily intake of 2 to 5 kg of water. Ingestion and excretion of the amount of approximately equal to maintain the body’s water balance. When labor intensity increases or when the weather is hot, the human body needs more water. Once the body water loss of balance, it will affect the health, or even dangerous