An 82-year-old woman presents with post-prandial dull abdomen pain that has been present for almost a year. She dropped 25 pounds in the previous three months as a result of avoiding oral intake due to worsening discomfort symptoms. Her symptoms have not improved after repeated normal upper endoscopies and long-term proton-pump inhibitor medication. She underwent a laparoscopic cholecystectomy six months earlier for several tiny gallstones, which were discovered during a right upper quadrant ultrasound. Four months ago, a colonoscopy revealed a solitary, fully excised pedunculated tubular adenoma. A CT scan was conducted, and it reveals no indication of cancer (see below). The patient is cachectic upon examination. Her abdomen is soft and not painful to the touch, and no lumps are visible. An analysis of the lab results reveals microcytic anemia and an albumin level of 2.4. The most effective course of treatment for this patient would be: