患者，男，65岁。因"腰腿痛伴间歇性跛行2年，加重2个月"入院。患者2年前开始出现下腰痛，逐渐出现双下肢疼痛麻木和发胀感，右下肢明显，行走约1000m后需停下休息。保守治疗无效。近2个月感腰腿痛及麻木感加重，行走约150m即需蹲下休息，并出现双下肢无力感。骑车不受限制，可上楼或爬山，但下楼时觉腰腿痛加重。
应首选的治疗方法是（）
A.单纯椎管减压术
B.椎管减压加经椎弓根内固定，滑脱复位，植骨融合术
C.静脉应用扩血管药物
D.动脉移植术
E.骶管封闭
参考答案：B
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| Eight ways to have a good school-life Your schooldays should be some of the best and happiest days of your 1 . How can you get the 2 from them, and ensure you do not 3 this wonderful opportunity (机会) to learn? 1 Be positive (积极) about school! Don't say things are difficult or 4 . Be interested in school-life and your school subjects. Join lots of activities. Be quick to put your hand up. Go round the school with a big smile. 2 Expect to work. School is not a holiday camp. If you are not working, you are not learning, and you are wasting your time at school. Teachers cannot make everything 5 . 3 Keep fit. If you do not eat a good breakfast, you will be thinking about 6 in class. If you go to bed 7 and do not have enough sleep, you will be sleepy in class. Play some sports to keep your body strong. 4 Do today's work today. Do not say you will do things 8 . if you get 9 the class, it is very difficult to get back in front. You cannot finish a race if you rest all the time. 5 Don't be too disappointed if things sometimes go 10 . Everyone fails some tests, loses some matches and has bad days. Friends are not always perfect, and they sometimes say and do 11 things. Don't let small problems seem very big and important. 6 Talk about problems-sometimes they are only the result of misunderstanding. Don't be too embarrassed (窘迫) to ask for help. You are young. No one thinks you can do 12 ! 7 Plan your time. Don't waste life 13 in bed on Saturday morning. Go and play a sport, learn the piano, work on a project, read a book, practice English, or help someone 14 problems. There are always a lot of things to do. 8 Set targets (目标). If your last grade was a D, work for a C. Try to make 15 bit by bit. Think of small targets:"I will speak in class four times this week", "I will finish my project on Wednesday" or "I will get two more marks this week" Follow our advice, and have a happy school-life!
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