问题 问答题 简答题

简述产后出血的病因。

答案

参考答案:

(1)精神过于紧张如产妇精神过度紧张,产程过长,使用过长,使用镇静药过多,麻醉过深,也可造成胎盘收缩无力,出现大出血。又如羊水过多、巨大儿、多胎妊娠时。由于子宫过度膨胀,使子宫纤维过度伸长,产后也不能很好收复;生育过多过频,使子宫肌纤维有退行性变,结蒂组织增多,肌纤维减少而收缩无力等等,也是造成产后大出血的原因之一。

(2)胎盘滞留,也是造成大出血的原因之一包括胎盘剥落不全、胎盘粘连等,都可造成大出血。

(3)凝血功能障碍产妇患有血液病,重症肝炎,其后果也很严重,必须高度注意。分娩时应到有条件的医院,以免发生意外。

单项选择题

C

If you are a fruit grower—or would like to become one—take advantage of Apple Day to see what’s around. It’s called Apple Day but in practice it’s more like Apple Month. The day itself is on October 21, but since it has caught on, events now spread out over most of October around Britain.

Visiting an apple event is a good chance to see, and often taste, a wide variety of apples. To people who are used to the limited choice of apples such as Golden Delicious and Royal Gala in supermarkets, it can be quite an eye opener to see the range of classical apples still in existence, such as Decio which was grown by the Romans. Although it doesn’t taste of anything special, it’s still worth a try, as is the knobbly(多疙瘩的) Cat’s Head which is more of a curiosity than anything else.

There are also varieties developed to suit specific local conditions. One of the very best varieties for eating quality is Orleans Reinette, but you’ll need a warm, sheltered place with perfect soil to grow it, so it’s a pipe dream for most apple lovers who fall for it.

At the events, you can meet expert growers and discuss which ones will best suit your conditions, and because these are family affairs, children are well catered for with apple-themed fun and games.

Apple Days are being held at all sorts of places with an interest in fruit, including stately gardens and commercial orchards(果园).If you want to have a real orchard experience, try visiting the National Fruit Collection at Brogdale, near Faversham in Kent.

What is the author’s purpose in writing the text?()

A. To show how to grow apples.

B .To introduce an apple festival.

C. To help people select apples.

D. To promote apple research.

单项选择题