2. 5‰和1%的力量： 一年365天，每天进步5‰或1%，累计进步多少呢？ 一年365天，每天退步5‰或1%，累计剩下多少呢？用python编程写出来

2.5‰（千分之二点五）等于0.0025，1%则等于0.01。如果每天进步这个比例，我们可以计算一年后的累积进步量：

# 定义每天的进步百分比
progress_per_day = {
    "‰": 0.0025,
    "%": 0.01,
}

# 设置总天数
total_days = 365

# 初始化累积值
cumulative_increase = {key: 0 for key in progress_per_day.keys()}
for unit, rate in progress_per_day.items():
    cumulative_increase[unit] = total_days * rate

print(f"每天进步{progress_per_day['‰']}或{progress_per_day['%']}, 累计进步大约为：")
for unit, increase in cumulative_increase.items():
    print(f"{unit}: {increase:.2f}")

# 如果每天退步，情况相反
decrease_per_day = -progress_per_day
remaining_after_decrease = {key: total_days * decrease for key, decrease in decrease_per_day.items()}

print("\n每天退步{progress_per_day['‰']}或{progress_per_day['%']}, 累计剩下大约为：")
for unit, remaining in remaining_after_decrease.items():
    print(f"{unit}: {remaining:.2f}")

运行上述代码会得到具体的数值。请注意，由于浮点数精度问题，结果可能会有微小的差异。