Final answer:
Nutritional support is vital for both preoperative and postoperative patients with gastric cancer who experience weight loss.
Step-by-step explanation:
Nutritional support is vital for both preoperative and postoperative patients with gastric cancer who experience weight loss. Gastric cancer can cause difficulties with food intake and absorption, resulting in weight loss. By providing adequate nutritional support, patients can receive the necessary nutrients to maintain their health and aid in their recovery after surgery. This support may involve dietary modifications, including the use of liquid or specialized high-calorie, high-protein supplements.