Prof. Dr. M A Khan focuses on diagnosing and treating disorders related to the blood and the hematopoietic system. They are considered good doctors because they possess extensive knowledge and expertise in the field of hematology. Hematologists are trained to perform various diagnostic tests and procedures to determine the cause of blood disorders, interpret laboratory results and imaging findings, and develop personalized treatment plans tailored to the specific needs of each patient. They work closely with patients to monitor their progress and adjust the treatment plan as necessary, providing ongoing support throughout the treatment process. In addition, hematologists play an important role in preventing blood-related disorders by counseling patients on lifestyle changes that can reduce their risk of developing these conditions. Overall, hematologists are good doctors because they possess the skills, knowledge, and compassion necessary to provide effective and comprehensive care to patients with blood-related disorders.