仿照例子，给食物分类。

rice       fish        noodles       water        beef       vegetable       tea    

soup     chicken      juice       hamburger      milk       peach      coffee

Drink:  water                                                                               

Eat:  rice                                                                                     

中柱鞘部位含石细胞环带的是( )

A．白芍
B．厚朴
C．肉桂
D．杜仲
E．黄柏