He is the first person you can think of to rely on, for he is always willing to ________ whoever is in trouble.

A．cut out

B．figure out

C．test out

D．help out

女性，56岁，间歇性反复发作腹痛、发热、黄疸，最可能的诊断是

A．肝癌

B．胰头癌

C．胆总管结石

D．阿米巴肝脓肿

E．急性传染性肝炎