"小孩诊 断为颅内膜出血以及视网膜后出血" ---- there are no such diagnoses. I can see that "颅内膜出血" can be made by CT but this is not a correct diagnosis, and the "以及视网膜后出血" was diagnosed by what?
Seen this type before. If you could get the correct wording of the diagnosis, then go search on PubMed or other medical literature. If you could find enough evidence/paper to contradict that MD's "believe or experience", then you would win.
But first of all, get all the facts.
Good luck.