My friend Bob just bought an apartment in a suburb of Beijing last week, which is much smaller than ours

but is three times _____ expensive. [ ]

A. very

B. so

C. too

D. as

男性，40岁，反复口腔、肛门溃疡5年，近1个月双膝关节酸痛、视力下降。针刺反应阳性。

眼底造影提示：视网膜及视神经盘呈弥漫性染色，说明患者眼底（）

A.血管通透性增加

B.色素沉着

C.变性

D.炎症改变

E.水肿

F.增生