ResearchersinChinaandtheUnitedStateshavedevelopedanewca...
問題詳情:
Researchers in China and the United States have developed a new cataract(白內障)treatment with cells that has restored vision in babies in a trial and may eventually be used in adults.
The treatment- by doctors and staff members at the University of California, San Diego School of Medicine and Sichuan and Sun Yat-sen universities in China-was published in March 9 edition of the scientific journal Nature.
A cataract is a clouding of the normally clear lens(晶體)of an eye. Typical cataract operation involves the removal of the cloudy lens and the insertion of an artificial one. The new operation has been tested in animals and during a small, human trial. It resulted in fewer complications(併發症)than the current harmful operation, and in regrown lenses with superior visual function in all 12 of the baby cataract patients who received the procedure.
A congenital cataract- lens clouding that occurs at birth or shortly after- is important cause of blindness in children. In the new research, Kand Zhang, head of ophthalmic genetics at US San Diego’s Shiley Eye Institute, and his colleagues relied on the regrown potential of endogenous(同源的)stem cells.
According to Zhang, endogenous stem cells are different from other stem cells that are typically grown in a laboratory, transplanted into a patient, and can have risks of immune(免疫的)rejection, infection or cancers. Zhang told CBS News, “We invented a new operation to make a very small opening at the side of a cataractous lens bag, remove the cataract inside, allow the opening to heal, and promote potential lens stem cells to regrow an entirely new lens with vision.”
The human trial involved 12 babies under the age of 2 who were treated with the new method, while 25 babies received thee standard operation care.. The latter group experienced a higher incidence of pos- operation danger, early- onset eye high blood pressure and increased lens clouding. The scientists reported fewer complications and faster healing among the 12 babies who has the new procedure.
12. What is the text mainly about?
A. The concept of the cataract
B. A new cataract treatment with stem cells
C. Bad effects of post-operation in the cataract
D. The reasons why the cataract comes into being
13. Which of the following best describe the new cataract treatment according to the passage?
A. Convenient B. Comfortable
C. Cheap D. Safe
14. What can we learn about the new cataract treatment?
A. It has more risks
B. It may be used widely
C. It has been put into practice widely
D. It can only restore vision in babies
15. What does the underlined word “congenital” in the fourth paragraph mean?
A. Born B. Strange
C. Serious D. Dangerous.
【回答】
BDBA
知識點:科普環保類閱讀
題型:閱讀理解
-
讀下圖,回答3—4題3.水迴圈中A.①環節是水汽輸送,中緯西風是其主要動力B.②環節是降水,主要集中在春、秋季...
問題詳情:讀下圖,回答3—4題3.水迴圈中A.①環節是水汽輸送,中緯西風是其主要動力B.②環節是降水,主要集中在春、秋季節C.③環節是地表徑流,徑流量季節和年際變化大D.④環節蒸發的水汽,大部分被輸送到陸地上空4.關於圖中*、乙、*、丁四處的敘述,正確的是A.*處為向斜山,主要由...
-
簡答題(選做一題)(5分)20.閱讀下面《紅樓夢》選段,依據原著故事情節,回答問題。一句話未了,忽見一個老婆子...
問題詳情:簡答題(選做一題)(5分)20.閱讀下面《紅樓夢》選段,依據原著故事情節,回答問題。一句話未了,忽見一個老婆子忙忙走來,說道:“這是那裡說起!金釧兒姑娘好好的投井死了!”金釧兒因何投井自盡?她死後,王夫人和寶釵對此作何反應?請簡述。21.閱讀下面《歐也妮·葛朗臺》選段,...
-
閱讀下面的文言文,完成1—4題。陳宗禮,字立之。少貧力學,袁甫為*東提點刑獄,宗禮往問學焉。淳祜四年,舉進士。...
問題詳情:閱讀下面的文言文,完成1—4題。陳宗禮,字立之。少貧力學,袁甫為*東提點刑獄,宗禮往問學焉。淳祜四年,舉進士。調邵武*判官,入為國子正,遷太學博士、國子監丞,轉祕書省著作佐郎.入對,言火不循軌①。帝以星變為憂,宗禮曰:“上天示戒,在陛下修德佈政以迴天意。”又曰:“...
-
下列句子中沒有運用擬人修辭手法的一項是( ) A.我們的春雁每天都要去玉米地作一次旅行,但絕不是偷偷摸摸進行的...
問題詳情:下列句子中沒有運用擬人修辭手法的一項是( ) A.我們的春雁每天都要去玉米地作一次旅行,但絕不是偷偷摸摸進行的。B.每次出發前,都有一場高聲而有趣的辯論,而每次返回之前的爭論則更為響亮。C.3月的大雁則不同。儘管它們在冬天的大部分時間裡都可能受到*擊,但...
相關文章
- 改錯:(2018·全國卷Ⅲ)WangservesastheheadoftheArchitectureDepar...
- 閱讀與回答問題SixteenisaspecialageintheUnitedStates.There’soft...
- It'slateeveninginthemiddleofthewinter.Thesnowisdeep,but...
- 單項選擇。WheneverMaryreadsaninterestingstory,shecan'tkeepit...
- 單項選擇。WheneverMaryreadsaninterestingstory,shecan'tkeepit...
- 單項選擇。WheneverMaryreadsaninterestingstory,shecan'tkeepit...
- “ThreeApples”changedtheworld.Thefirstoneseduced(引誘)Eve...
- You'veseenpeopleinneedonthenewsafterahurricane,anearthq...
- 單項選擇。WheneverMaryreadsaninterestingstory,shecan'tkeepit...
- 完形填空“Justsignhere,sir,”thedeliverymansaidashehandedOsca...