For ovarian cancer patients with poor immunity, diet can be used to enhance immunity. It is recommended to eat the following foods:

1. Fresh vegetables: Such as green leafy vegetables, broccoli, tomatoes, etc., rich in trace elements and vitamins, which help maintain the immune system.

2. Fruits: such as kiwi and citrus fruits, rich in vitamin C, which helps boost immunity.

3. Protein-rich foods: such as fish, lean meat, and legumes, provide the body with ample protein, aiding in the generation of immune cells.

4. Mushrooms: such as shiitake and black fungus, rich in polysaccharides, which help enhance immunity.

5. Other foods: such as nuts and black sesame seeds, contain abundant unsaturated fatty acids and vitamin E, beneficial for the immune system.

Additionally, ovarian cancer patients should also maintain good lifestyle habits, as adequate sleep and moderate exercise can help boost immunity. At the same time, it is important to avoid consuming spicy, stimulating, or greasy foods and reduce the intake of preserved foods. If a patient's immunity is severely compromised, it may be necessary to consult a doctor or nutritionist for advice on developing a more specific dietary plan.

Please note that while food can help enhance immunity, it cannot replace medical treatments. Ovarian cancer patients should actively cooperate with their doctors' treatment and advice, maintain a positive mindset and healthy lifestyle habits, and strive for a speedy recovery.