首页
登录
职称英语
Thousands of years ago man used handy rocks for his surgical operations. Lat
Thousands of years ago man used handy rocks for his surgical operations. Lat
游客
2024-02-05
4
管理
问题
Thousands of years ago man used handy rocks for his surgical operations. Later he used sharp bone or horn, metal knives and more recently, rubber and plastic and that was where we stuck, in surgical instrument terms, for many years. In the 1960s a new tool was developed, one which was, first of all, to be of great practical use to the armed forces and industry, but which was also, in time, to revolutionize the art and science of surgery.
The tool is the laser and it is being used by more and more surgeons all over the world, for a very large number of different complaints. The word "laser" means: light amplification by stimulated emission of radiation. As we all know, light is hot, any source of light — from the sun itself down to a humble match burning — will give warmth. But light is usually spread out over a wide area. The light in a laser beam, however, is concentrated. This means that a light with no more power than that produced by an ordinary electric light bulb becomes intensely strong as it is concentrated to a pinpoint-sized beam.
Experiments with these pinpoint beams showed researchers that different energy sources produce beams that have a particular effect on certain living cells. It is now possible for eye surgeons to operate on the back of human eye without harming the front of the eye, simply by passing a laser beam right through the eye-ball. No knives, no stitches, no unwanted damage — a true surgical wonder. Operations which once left patients exhausted and in need of long period of recovery time now leave them feeling relaxed and comfortable. So much more difficult operations can now be tried.
The rapid development of laser techniques in the past ten years has made it clear that the future is likely to be very exciting. Perhaps some cancers will be treated with laser in a way that makes surgery not only safer but also more effective. Altogether, tomorrow may see more and more information coming to light on the diseases which can be treated medically. [br] The appearance of the laser in the 1960s results in______.
选项
A、a complete revolution in the science of surgical techniques
B、an end to pain brought by all diseases
C、medical help accessible to more common people
D、complete changes in man’s approach to surgery
答案
A
解析
细节题。第一段最后一句提到,这种新的手术工具为外科医学带来了革命性的影响。故答案为A。
转载请注明原文地址:https://tihaiku.com/zcyy/3423075.html
相关试题推荐
[originaltext]Jointhethousandsofprofessionalsandinternationaltravele
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstoflo
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstoflo
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstoflo
Thousandsofyearsagomanusedhandyrocksforhissurgicaloperations.Lat
Thousandsofyearsagomanusedhandyrocksforhissurgicaloperations.Lat
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstoflo
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstoflo
Thousandsofyearsagomanusedhandyrocksforhissurgicaloperations.Lat
Thousandsofyearsagomanusedhandyrocksforhissurgicaloperations.Lat
随机试题
Keith:Compliancewithnewgovernmentregulationsrequiringtheinstallationof
如选用石灰煤渣土做路面基层或底基层时,混合料中石灰应不少于10%,并应通过试验选
患者,女性,肝硬化3年,行外科手术治疗,术中发现脾动脉瘤。 根据其发生的部位可
甲经纪公司聘用了没有房地产经纪人执业资格的张某从事经纪业务,甲经纪公司和张某的行
某演唱会主办方为观众准备了白红橙黄绿蓝紫7种颜色的荧光棒各若干只,每名观众可在入
()是中国旧民主主义革命的结束和新民主主义革命的开端的标志。A.北京大学的成立
下列哪项建设用地的使用权可以采用行政划拨的方式取得?()(2012年真题)
某分项工程高处作业高度10m,其高处等级、坠落半径分别是( )。A.一级、2m
患者男性,35岁,间断上腹痛2年,查体,无贫血貌,皮肤巩膜无黄染,心肺无异常,腹
未经医师注册取得执业证书的A、可在预防机构从事医师执业活动 B、可在保健机构从
最新回复
(
0
)