I regret to have not paid more attention to our English lessons at school.

A．not paying

B．not having paid

C．have not paid

D．not to have paid

男，65岁，中上腹痛腹胀、消瘦、乏力、纳差，影像检查如图，最可能的诊断是()

A．胃间质瘤

B．萎缩性胃炎

C．肥厚性胃炎

D．胃窦癌

E．胃淋巴瘤