问题 问答题 案例分析题

男性,生后4天,以“便血伴脐带残端渗血1天”为诉入院。G1P1孕34周,自然分娩,无胎儿宫内窘迫,出生体重:1500g,生后初为人工喂养,后母乳喂养至今,近一天来患儿大便为暗红色血便,且脐带残端渗血逐渐加重,病程中无发热及抽搐,吸力较前减弱,无吐奶及呛奶,小便正常。入院查体:T37℃,P126次/分,R42次/分W:3350g,面色及全身稍苍白,精神欠佳,呼吸平稳,无三凹征,双肺呼吸音清,未闻及干、细湿啰音。心率126次/分,律齐,心音有力,未闻及杂音,腹软,肝脾不大,双下肢无浮肿,四肢肌张力正常,原始反射引出正常。急查化验示凝血酶原及部分凝血活酶的时间延长,而出血时间、血小板计数正常。血常规回报示:HB139g/L。

治疗原则。

答案

参考答案:1、一般治疗有消化道出血是应禁食,待便血控制,粪隐血阴性后给予喂养。2、特殊治疗(1)维生素K疗法5-10mg/日,静脉注射,连用3天;(2)输新鲜血重症出血者输新鲜全血,按10-20ml/(kg.次),可及时补充凝血因子,纠正低血压和贫血。

单项选择题

(B)

You can tell the age of a tree by counting its ring. But these records of a tree’s life really say a lot more. Scientists are using tree ring to learn what’s been happening on the sun’s surface for the last ten thousand years. Each ring represents a year of growth. As the tree grows, it adds a layer to its trunk, taking up chemical elements from the air. By looking at elements in the rings from a certain years, scientists can tell what elements were in the air that year. Dr. Stevenson is analyzing one element, carbon-14, in ring from both living and dead tree. Some ring go back almost ten thousand year to the end of the Ice Age. When Stevenson followed the carbon-14 levels changed with the intensity of solar burning. You see, the sun has cycles. Sometimes it bums fiercely, and at other times it is relatively calm. During the sun’s violent periods, it throw off charged particles in fast moving streams called "solar winds". The particularly interfere with the formation of carbon-14 on earth. When there is more solar wind activity, less carbon-14 is produced. Ten thousand years of tree ring show that the carbon-14 level rises and falls about every 420 years. The scientists concluded that solar wind activity must follow the same cycle.

The purpose of the scientists in studying tree ring is to()

A. examine the chemical elements in Ice Age

B. look into the pattern of solar wind activity

C. analyze the composition of different trees

D. find out the origin of carbon-14 on earth

单项选择题