男孩，10个月，母乳加米糕喂养，未添加其他副食，近2个月来患儿面色苍白，食欲减退，肝脾轻度肿大，Hb80g／L，RBC3.5×10/L，WBC正常。
本病治疗，哪一项是正确的（）
A.铁剂加维生素C
B.维生素B加叶酸
C.维生素C加叶酸
D.铁剂加抗生素
E.输全血
参考答案：A
解析：母乳加米糕喂养，未添加其他副食，铁摄入不足，Hb80g/L，RBC3.5×10/L，WBC正常符合营养性缺铁性贫血的特点。根据患儿病史及末梢血象特点可作出初步诊断，进一步查有关铁代谢的生化检查有确诊意义。维生素C可促进铁的吸收。网织红细胞上升是早期有效指标。
Directions: Complete the following passage by using the words in the box. Each word can only be used once. Note that there is one word more than you need.
Knowledge is free on the Internet at a small but __小题1:___ number of colleges and universities. About 160 schools around the world now put free course materials on the web to the ___小题2:___. Recent additions in the United States ___小题3:___ projects at Yale, Johns Hopkins and the University of California, Berkeley. Berkeley said it would offer videos of lectures on YouTube. Free videos from other schools are ___小题4:___ at the Apple iTunes store. The Massachusetts Institute of Technology (M.I.T.) became an early ___小题5:___with its Open Course Ware project, first ___小题6:___ in 2001. Free lecture notes, exams and other resources are published at ocw.mit.edu. Many exams even include the answers. Today, Open Course Ware offers materials from 1,800 undergraduate and graduate courses. These ___小题7:___ from physics to political science. Visitors can learn the same things that M.I.T. students learn. But as the site points out, Open Course Ware is not a M.I.T. education. Visitors receive no credit toward a degree. Some materials from a course may not be available, and the site does not provide ___小题8:___ with teachers. Still, M.I.T. says that the site has had forty million visits by thirty-one million visitors from almost every country. Sixty percent of the visitors are from outside the United States and Canada. Students and educators use the site, including students at M.I.T. But the largest number of visitors, about half, are self-learners. Some professors have become well-known around the world as a result of appearing online. Walter Lewin, a physics professor at M.I.T., is ___小题9:___ popular. Fans enjoy his entertaining lectures. M.I.T. Open Course Ware now includes materials for high school. The aim is to improve education in science, technology, maths and engineering. |