女性，65岁，反复咳嗽，咳痰伴喘息30年，加重1周入院。查体：神清，紫绀，颈静脉怒张，双肺散在中小水泡音及干鸣音，心率120次／min，律齐。肝肋下3cm，双下肢可凹性水肿。外周血白细胞12×10⁹／L，中性粒细胞80%。胸片示右下肺动脉干17cm，双肺纹理重。对该患者最重要的治疗措施是（）。

A.立即吸氧，静点呼吸兴奋剂

B.积极抗感染，保持呼吸道通畅

C.给予西地兰纠正心律失常

D.静点氨茶碱和地塞米松

E.静脉注射速尿，消除水肿

用所给动词的正确形式填空。

1．There're 50 students in my class and we _________ (divide) into 5 groups by Mr Wu.

2．If you have some difficulty ___________ (finish)your homework, please ask Miss Gao for help.

3．Mum told me ___________ (not disturb) Dad.

4．As Millie __________ (walk) past the bookshop, she suddenly thought of buying A TV guide.

5．Remember __________ (read) the passage three times at least if you don't understand it.