To me, climbing mountain in high altitude was very tiring—I had a little bit “High Altitude Reaction”. I cannot climb too fast, not to mention running, otherwise, my heart would be beating faster and faster.(BTW: One of my friends told me, he and his wife would be breathless, even when they went to their room from the ground floor to the second floor. )

Once, I heard a story that a strong man was died in 页码：[1] [2] [3] [4] [5] [6] [7] [8] 第4页、共8页