慢性粒细胞白血病与类白血病反应最主要的区别是
A．外周血白细胞计数高
B．外周血可见中幼粒、晚幼粒细胞
C．脾大
D．Ph染色体阳性
E．骨髓检查：粒细胞增生活跃
参考答案：D
解析：在备选答案中，Ph染色体阳性是慢性粒细胞白血病与类白血病反应最主要的区别，后者Ph染色体为阴性。其他干扰答案均不是主要的区别。骨髓检查有时对二者的区别有一定困难，其特异性不如Ph染色体阳性高，故应选D。
| Cooperation is the common endeavor of two or more people to perform a task or reach a jointly cherished goal. Like competition and conflict, there are different forms of cooperation, based on group organization and attitudes. In the first form, known as primary cooperation, group and individual unite. The group contains nearly all of each individual’s life. The rewards of the group’s work are shared with each member. There is an interlocking identity of individual, group, and task performed. Means and goals become one, for cooperation itself is valued. While primary cooperation is most often characteristic of preliterate societies, secondary cooperation is characteristic of many modem societies. In secondary cooperation, individuals devote only part of their lives to the group. Cooperation itself is not a value. Most members of the group feel loyalty, but the welfare of the group is not the first consideration. Members perform tasks so that they can separately enjoy the fruits of their cooperation in the form of salary, prestige, or power. Business offices and professional athletic teams are examples of secondary cooperation. In the third type, called tertiary cooperation or accommodation, latent conflict underlies the shared work. The attitudes of the cooperating parties are purely opportunistic; the organization is loose and fragile. Accommodation involves common means to achieve antagonistic goals; it breaks down when the common means cease to aid each party in reaching its goals. This is not, strictly speaking, cooperation at all, and hence the somewhat contradictory term antagonistic cooperation is sometimes used for this relationship. |
The underlined word "cherished" in Paragraph 1 is closest in meaning to ______.
A．prized
B．based on
C．defined
D．set up