—It was very crowded （）I went there last night.
—I don't care whether it's crowded or not. I'd like to see it anyway.

A. though

B. because

C. when

D. since

对于视网膜中央动脉阻塞的急诊处理不包括()

A．吸人95%氧和5%二氧化碳混合气体

B．降眼压

C．含服硝酸甘油片

D．视网膜光凝

E．球后麻醉