The answer is Primary (care service).
Explanation:
Primary care is the supplying of a first-line health service. Includes: diagnosis of a health condition, treatment and long-term care for chronic conditions (diabetes, hypertension, etc).
The service provided by Dr. Jones, who is most likely a primary care physician, includes both diagnosis (upper respiratory tract infection) and treatment (the antibiotic prescription and the 10-to-14-day follow-up).
