<qa>  What is the CTC number of new solitary pulmonary nodule patient?By testing the CTC number of new solitary pulmonary nodule patient, evaluating the correlation of CTC number and benign and malignant lung nodules auxiliary diagnosis, the correlation of CTC number and the size of lung nodules of the malignant patients, the correlation between the CTC number and subtypes of malignant lung nodules patients.The CTC and tumor markers will be detected before the patient received treatment. Tumor markers include Pro-GRP, NSE, CEA, CYFRA211, SCC. 