问题 单项选择题

术后贫血合并心功能不全的老年病人,输入以下何种血细胞制品最恰当().

A.浓缩红细胞

B.库存全血

C.去白细胞的红细胞

D.冰冻红细胞

E.洗涤红细胞

答案

参考答案:A

解析:浓缩红细胞不含或少含血浆,适用于血容量正常而需补充红细胞的贫血,尤其适用于慢性贫血及心功能不全者输血,不易引起循环超负荷。洗涤红细胞主要用于对白细胞凝集素有发热反应者及肾功能不全不能耐受库存血中之高血钾者。去白细胞的红细胞主要用于预期需要长期或反复输血者。

单项选择题

Congress makes the laws in the United States. It has two pans, which are more or less equal in power. They are known as the House of Representatives and the Senate. The House of Representatives is larger than the Senate whose 100 members (two from each state) serve for six years. The 435 members of the House are elected every two years, and the number from each state is determined by the population of the state. For example, California, which has a large population, has 43 representatives, while the State of Nevada has only one.

The House and Senate are divided into small groups which take care of special matters such as education or foreign affairs. The most important work of Congress is often done in these groups, which are called subcommittees.

According to the Constitution of the United States, a senator must be at least 30 years old and he must have been a citizen of the United States for nine years at the time of his election. To be elected to the House a person must be 25 years old and must have been a United States citizen for seven years. At the present time, members of Congress include businessmen, farmers, teachers, and especially lawyers. In general, senators are better known than representatives because they are fewer in number and serve for a longer time. Many American presidents served in Congress before they became president.

The number of the members in the House from each state ().

A. is fixed, two from each state

B. depends on how many people the state has

C. depends on the size of the state

D. depends on the location of the state

选择题