无眩晕、无听力障碍和肌力完好的患者，出现右上肢指鼻试验不正确和轮替动作差、右下肢跟膝胫试验差。病损部位在（ ）。

A．小脑蚓部

B．右侧小脑半球

C．左侧小脑半球

D．左侧脑桥前庭神经核

E．右侧脑桥前庭神经核

Study the following drawing carefully and write an essay in which you should

1) describe the drawing ;

2) interpret its meaning;

3) support your view with examples.

You should write about 160-200 words neatly.