Q. A 60-year-old male presents to the gastroenterology clinic with a two-day history of left lower quadrant abdominal pain. The pain is mild to moderate in intensity and constant. He also reports a low-grade fever and a change in bowel habits, with some episodes of constipation. He has a history of diverticulosis. There is no history of previous abdominal surgeries, and he does not take any regular medications. On physical examination, his temperature is 37.5°C (99.5°F). The abdominal exam reveals mild tenderness in the left lower quadrant with no rebound or guarding. Laboratory tests show a slightly elevated white blood cell count. An abdominal CT scan confirms the presence of diverticulitis without any complications such as abscess or perforation. Considering the patient's diagnosis of uncomplicated diverticulitis and the absence of severe symptoms, what would be the primary treatment?