Divided into 3 Arms ALI :Diagnostic criteria: 1.Acute onset；2.FiO2/ PaO2＜ 40.0 kPa (300mmHg, ALI); 3.Chest X-ray showed that the double lung texture increased, the increase of crude, fuzzy, visible diffuse patchy infiltration shadow with compensatory emphysema, for the most early performance; B. double lung field large sheet, asymmetric, edge fuzzy infiltration shadow, the most dense in the lung；4. Echocardiography, left atrial hypertension; 5.The gestational age >35 week, have maternal age cholestasis (severe), sepsis or meconium aspiration syndrome (MAS) understanding of history, and with the exception of the primary pulmonary surfactant (PS) lack of.