Blood routine examination is a common clinical examination, which can generally check whether anemia, bacterial virus infection, platelet deficiency and so on. It can also diagnose and eliminate some blood diseases. I suggest you don't feel nervous. These are common auxiliary examinations for clinical reference only. Pay attention to proper nutrition and exercise in diet. If you feel unwell, you can see if you need to check under the guidance of a doctor. Don't be too stressed.
I wish you the best of health!