问题 单项选择题

男性病人,22岁,突发高热寒战,T39.6℃,左髋关节肿胀明显,关节处于屈曲位。白细胞25×109/L,中性白细胞0.90,X线示关节间隙变窄,关节穿刺抽出混浊关节液,全身抗生素治疗5日,症状无明显改善。

术后护理下列哪项是正确的______

A.保持引流通畅,滴入管应高于1m
B.术后早期应快速滴入冲洗液
C.不可翻身按摩,以防病理性骨折
D.不必使用抗生素
E.每日一次观察生命体征

答案

参考答案:B

单项选择题
单项选择题

Scientists have for the first time used cloning to create human embryos that live long enough in a laboratory dish to have their stem cells harvested. The feat could set the stage for physicians to produce cells and tissues, tailored to a patient’s genetic identity that can treat a wide variety of human illnesses. The accomplishment also provides a road map for how to clone a person, an even more divisive undertaking.

The new work, performed in South Korea, represents "a major advance in stem cell research. It could help spur a medical revolution as important as antibiotics and vaccines", says Robert Lanza of Advanced Cell Technology (ACT), a company in Worcester, Mass., that’s also investigating the promising stem cell strategy called therapeutic cloning.

"However, now that the methodology is publicly available", Lanza adds, "I think it is absolutely imperative that we pass laws worldwide to prevent the technology from being abused for reproductive-cloning purposes."

While some fertility doctors and a religious cult have claimed success at creating a pregnancy via cloning, they’ve offered no convincing proof. In contrast, the South Korean research is being reported at the meeting of the American Association for the Advancement of Science in Seattle and will appear in an upcoming Science. "This is reality," says stem cell researcher John Gearhart of Johns Hopkins University. "He4’e is a bona fide, refereed journal saying that a human embryo has been cloned and a cell line derived from it."

Although ACT has not yet published a report of a cloned human blastocyst, Lanza says that the South Korean success is "consistent with our own results." Therapeutic cloning appeals to Lanza and physicians because cells made this way could have the same DNA as a patient’s cells do and thus avoid rejection after they’re transplanted.

Seeking a compromise that would permit this strategy to be pursued, many scientists have called for legislation that would ban cloning to produce a baby but allow the creation of cloned embryos to generate stem cells for research or therapies. "The debate has been very polarized," notes bio-ethicist Laurie Zoloth of Northwestern University in Evanston.

It can be inferred from the passage that human cloning()

A. has not been so successful as some fertility doctors claim

B. will definitely be banned through legislations

C. has encountered huge technological and funding problems

D. is another project being implemented by South Korean scientists