用所给单词的适当形式填空。

1. Mary told me that she had been to China ____ (two).

2. Here are the results of the _____ (student) activity survey at Hilltop High School.

3. Can you tell me who is the _____ (healthy) student in your class?

4. My _____ (eat) habits are pretty good.

心包积液时，超声表现下列哪项不对()

A．当液性暗区超过25mm时，积液量常大于1000ml

B．少量积液即可显示清楚

C．少量积液多见于右室前壁之前

D．大量积液时，下腔静脉增宽

E．坐位探查时心尖部液性暗区加宽