A 35-year-old male patient has recurrent epigastric pain for 6 years, mostly occurring in autumn. The pain typically appears before meals and is relieved after eating. In the past 2 days, the pain recurred with acid regurgitation. Physical examination reveals tenderness under the xiphoid process, HB 105g/L, and fecal occult blood (+++). If the patient tests positive for Helicobacter pylori, which treatment should be used?