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问题 单项选择题

男性，45岁。从山坡上摔下昏迷3小时。查体：体温36.3℃，脉搏120次／分，呼吸20次／分，血压70/50mmHg。腹腔穿刺抽出暗红色不凝血。立即进手术室剖腹探查，腹腔内积血量2500ml，行肝破裂修补，脾脏切除术。术后24小时患者心率110次／分，血压（80～70）／（60～50）mmHg，CVP18cmH2O。目前根据CVP监测结果，最重要的处理措施是（）。

A.给氧

B.纠正酸中毒

C.应用强心剂

D.控制补液量

E.应用呋塞米

答案

参考答案：C

解析：CVP大于15cmH2O，血压仍低、心率快，提示心功能不全、静脉血管床过度收缩或肺循环阻力增高，继续过多补液有导致心力衰竭及肺水肿的危险。因此，应着重改善心功能，如给氧、纠正酸中毒等，但最重要的是应用强心剂，如异丙基肾上腺素、多巴胺、洋地黄等。

单项选择题

As one works with color in a practical, or experimental way, one is impressed by two apparently unrelated facts. Color as seen is a mobile, changeable thing (1) to a large extent on the relationship of the color (2) other colors (3) simultaneously. It is not (4) in its relation to the direct stimulus which (5) it. On the other hand, the properties of surfaces that give (6) to color do not seem to change greatly under a wide variety of illumination color, usually (but not always) looking much the same in artificial light as in daylight. Both of these effects seem to be (7) in large part to the mechanism of color (8) .

When the eye is (9) to a colored area, there is an immediate readjustment of the (10) of the eye to color in and around the area (11) . This readjustment does not promptly affect the color seen but usually does affect the next area to which the (12) is shifted. The longer the time of viewing, the higher the (13) , and the larger the area, the greater the effect will be (14) its persistence in the (15) viewing situation. As indicated by the work of Wright and Schouten, it appears that, at (16) for a first approximation, full adaptation takes place over (17) time if the adapting source is moderately bright and the eye has been in (18) darkness just previously. Also, (19) of the persistence of the effect if the eye is shifted around from one object to another, all of which are at similar brightness or have similar colors, the adaptation will tend to become (20) over the whole eye.

10（）

A.sensitivity

B.curiosity

C.decoration

D.impression
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问答题 简答题

简述输配电市场主体的主要特征。
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