女性，45岁，劳累性心慌气急1年余。体检：心尖区第一心音亢进及二尖瓣开放拍击音，并有舒张中晚期隆隆样先递减后递增型杂音，P亢进，超声心动图显示二尖瓣呈"城垛样"图形，前后瓣叶呈同向运动，开放受限，瓣口面积0.8cm，腱索正常。
其治疗首选（）
A.药物治疗
B.经皮二尖瓣球囊成形术
C.二尖瓣分离术
D.人工瓣膜置换术
E.体外反搏
参考答案：B
| TV Programmes | |
| Channel(频道) | Channel 2 |
| 18:00 Around China | 17:35 Computers Today |
| 18:40 Children’s programme | 18:05 Foreign Arts |
| 19:00 News | 18:30 English Classroom |
| 19:35 Weather Report | 19:10 Animal World |
| 19:40 Around the World | 19:35 China ’06 |
| 20:05 TV play: Sisters | 20:20 Sports |
| 21:00 English for Today | 21:00 TV play: Guo Lanying |
| 21:20 Classical Music | 21:50 English News |
| 21:55 Talk Show | 22:10 On TV Next Week |
If you want to know about programmes of next week, which channel will you choose
[A] Channel 1.[B] Channel 2.[C] Both of them.