问题 单项选择题 B型题

创伤失血性休克,第2天尿少。实验室检查:尿比重1.030,尿钠浓度8.2mmol/L,尿渗透压650mmol/L,尿沉渣见透明管型。其属于()

A.肾前性ARF

B.肾后性ARF

C.肾性ARF

D.去肾性尿闭

E.慢性肾衰竭

答案

参考答案:A

解析:4.该患儿为先天性异位性孤立肾(肾在盆腔),但将肾误作盆腔肿块切除造成去肾性尿闭。若术前作排泄性尿路造影、B超或CT检查则可避免这一严重错误。

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The right pair of exercise shoes can do a lot to prevent discomfort and injuries, personal trainers say. Here are some shopping tips:

71   Depending on your workout, shoes designed for walking, running, tennis, or something else that will provide the best support for your feet.

Shop when you normally exercise. Feet actually get bigger throughout the day, sometimes swelling(肿胀) up as much as a half-size by nighttime.   72  

Try them on .Never take a pair of exercise shoes based only on the size of footwear you normally buy. Bring the type of socks you’d wear to work out and go for a walk through the store.

73     you should be able to spread your toes out comfortably. Make sure there’s about a half-inch of space between them and the front of the shoe. The back should fit snugly(warmly and comfortably) against your heel and not move up and down. If your feet are different sizes, buy based on the larger one.

Talk to an expert. Shoe salesmen and personal trainers can study your stride(步伐) and the shape of your feet.   74  

75   Many trainers recommend changing footwear every three to five months, if possible, to maintain(保持) proper cushioning (软垫) and support.

One tip: if you have to tie your shoes very tightly to feel a good amount of support, they may be ready to go.

A.Think about how much you can afford to buy the workout shoes.

B.Consider your type of exercises.

C.Focus on fit

D.So don’t shop first thing in the morning if you often work out in the evening.E.Pay more attention to new style shoes.

F.Replace worn shoes regularly

G.Usually they can recommend the best shoes to guard against injuries.

单项选择题