雅思口语P1 What are the bad effects of staying up late today(文字版)

There are actually many kinds of bad effects of staying up late, for example, we wouldn't stay focused on one thing at a time if we stayed up late the day before. Also, the healthy problems can be apparent as well. Like the heart disease for example. I think there are lots of negatives of staying up late. For me, my efficiency at work or study wouldn't be improved any more. So, that is it.