Shanghai Expo has been building an Expo Village for the participants, but other choices will also be ____ if the Expo Village does not satisfy their needs．

A．accessible

B．available

C．affordable

D．approvable

下列药物哪味药属于泻下药？（）

A.青葙子

B.牵牛子

C.白芥子

D.苍耳子

E.栀子