5mm ground glass nodules, which are generally nodules with abnormal growths in the lungs that resemble ground glass-like in shape under CT, cannot be excluded as malignant tumors. Some patients may have a percutaneous lung puncture biopsy to clarify the nature of the nodule. Sometimes, other examinations such as chest enhancement CT, tumor markers, MRI, and PET-CT are also needed for some patients. During the examination and treatment period, patients should not drink alcoholic beverages, smoke, try not to eat too greasy and spicy food, etc. They can consume fresh fruits and green vegetables, and consume low-fat high-quality protein, such as fresh fish and shrimp.