No offense intended, but please don't expect too many people to be able to understand your question in your native tongue. An English translation might help.
I used google translate and it returned:
1. For the developed workflow, only one email will be sent for each workflow. I want to merge the contents of multiple emails sent by workflow into one email and send them instead of sending multiple emails. How to develop this?
2. How to add excel attachments of detection results to the email content sent by workflow?
3. How does Informatica develop reports?
I think we need a little bit more information. Can you elaborate a little more on your requirements
Like what is the information you wish to send in the email.
Currently the questions are to generic to give an answer which will really help you.