问题 单项选择题 A1/A2型题

有关淤血性肝硬化,哪项说法不正确()

A.常由右心功能衰竭引起

B.Budd-Chiari综合征亦可引起

C.其发生的主要原因为循环障碍

D.主要表现为肝大及腹水

E.无肝功能异常

答案

参考答案:E

解析:由于慢性充血性心力衰竭、缩窄性心包炎等使肝脏长期淤血和缺氧,最终形成肝硬化。Budd-Chiari综合征因肝静脉慢性梗阻造成长期肝淤血,也发生与心源性相同的肝硬化。临床表现同其他原因所致的肝硬化。血清酶学检查常有ALT、AST升高。肝硬化肝脏的大小和硬度随病情的早晚而不同。早期肝大、表面光滑、中等硬度。晚期缩小、坚硬、表面结节状不平。

单项选择题

Researchers at the University of Arizona, led by Teresa Cummins, conducted an exploratory study on the online learning modules, designed to supplement hands-on classes taught by local experts and supported by an overview text, to help users increase their understanding of key concepts in the Arizona Master Watershed Steward program. They also sought to determine whether program participants would use the non-compulsory modules.

Their evaluation revealed that module users increased their understanding of key watershed concepts; participants in the evaluation demonstrated a 30 percent increase in content knowledge following module use. Additionally, 70 percent of participants retained this knowledge through a two-month follow-up test.

A follow-up survey showed that approximately half of the participants returned to the online modules on their own; several of these users returned several times and spent multiple hours per session. Comments from the follow-up survey suggested that the users accessed the site either as they had the time or as they needed the information.

Online usage statistics indicated participants continued to visit the site for many months following the modules’ release and advertisement. Though many visits were very brief (a single pageview; only a couple of seconds), visitors with many returns to the site and/or long visits appeared to be working through the modules.

One participant stated, "My brain can only hold so much information; the modules keep information on-hand." Other participants commented that the modules were "more interesting and interactive" than the text material, and a "very effective tool" and "a great resource to the Master Watershed Steward community."

The Arizona Master Watershed Steward program, sponsored by University of Arizona, prepares adults to serve as volunteers in the conservation of water resources and the protection, restoration, and monitoring of their watersheds. The modules were intended to reinforce concepts covered in classes and further engage participants in the learning process.

One key finding was that the modules were not clearly preferred by users over in-person instruction. One participant stated, "For me, they are just another avenue for learning, a supplement or additional reference. I prefer in person and real hands-on learning." Other participants similarly expressed their desire for hands-on and face-to-face interaction. Several participants noted that the usefulness of in-person lectures—was a function of the presenter.

Overall, the exploratory evaluation indicated that the modules were a welcome supplement to the course and were effective in reinforcing key concepts. Participants retained knowledge for several weeks, although since subjects were self-selected, they may have been self-motivated to pay attention and master the online module materials.

"I am constantly searching for new ways to educate our program’s diverse audiences and reinforce watershed science concepts, " says Candice Rupprecht, state coordinator for the Master Watershed Steward program. "I am excited to know that online learning modules can enhance our program by offering additional independent learning opportunities for our volunteers.

What the participants expressed in Paragraph 7 means that()

A. users of the online modules want to learn some practical skills

B. teachers can teach program participants practical skills in classroom

C. some participants may consider learning in traditional classrooms better

D. learners prefer to select lectures by themselves on the internet

单项选择题