height = 1.75weight = 80.5BMI = weight / height ** 2if BMI < 18.5:    print("过轻")elif 18.5 <= BMI < 25:    print("正常")elif 25 <= BMI < 28:    print("过重")elif 28 <= BMI < 32:    print("肥胖")else:    print("严重肥胖")