呼吸是我们的一种最基本的也是与生俱来的生理活动。当我们身体健康的时候,我们每个人几乎没有感觉到呼吸的存在;然而当我们一旦呼吸困难时,我们就会感到非常的痛苦,甚至无时无刻不在为呼吸一口气而努力、奋斗。慢性阻塞性肺疾病,也就是我们通常所说的肺气肿,这是一种让患者呼吸困难、严重威胁老百姓生命的疾病。 Breathing is one of our most basic and innate physiological activities. When we are in good health, each of us feels almost no breath. However, when we have trouble breathing, we feel very painful, and even try to breathe and work hard all the time. Chronic obstructive pulmonary disease, which is what we commonly refer to as emphysema, is a disease that makes the patient difficult to breathe and seriously threatens the life of the common people.