Providing correct diagnoses. but since most of the contact is in physical appearance, being observant would be best. so in reality Good note taking skills, you keep track of whats going on and you are organized.
Answer: blood tests.
Explanation:
To check how well the body processes glucose, patients are to drink a sugary drink given to them by their doctor and as time goes on they give the patient more sugary drinks. Then after some hours of waiting they draw blood from the patient and see if there is any glucose in the blood.
