Stress is nonspecific and protective adaptation mechanism of human body. It also results in the change of homeostasis even diseases.
应激是机体的非特异保护适应机制，但它也引起机体自稳态的变动，甚至导致疾病。
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Hypoxic pulmonary hypertension (HPH) is a key link of the adaptation physiology in high altitude area and the pathogenesis of all types of high altitude diseases.