“How long have you worked on the farm?” “_________ the end of last year.”

A．In

B．By

C．At

D．Since

增加葡萄膜巩膜通道房水外流（）

A.缩瞳剂

B.β-受体阻滞剂

C.肾上腺素

D.前列腺素衍生物

E.碳酸酐酶抑制剂