It has been proved ___ eating vegetables in childhood helps to protect you against serious illnesses in later life.

A．if

B．because

C．when

D．that

男性，50岁，突然呼吸困难，咳粉红色泡沫样痰，呼吸急促，检查：血压190/110mmHg，心率110次／分，律齐，无杂音，双肺底湿性啰音，该患者的最佳治疗药物是（）

A.毛花苷C（西地兰）

B.氨茶碱

C.硝普钠

D.多巴酚丁胺

E.硝酸甘油