问题 单项选择题 B1型题

患者男,35岁。汽车撞伤左季肋区4小时。神志模糊,体温37.5℃,脉搏细弱,血压60/40mmHg,全腹压痛,无反跳痛,无尿。

首选的治疗措施是()

A.静脉用强心药物

B.迅速扩充血容量

C.立即手术治疗

D.利尿剂改善肾功能

E.应用抗生素

答案

参考答案:B

解析:1.双侧股骨干骨折可造成机体的大量失血,且3小时未经处理,出血量很大,结合患者脉搏细弱,血压60/40mmHg,四肢冰冷,无尿等情况来估计,患者属于重度休克,故选C;A、B错误;患者没有感染病史及诱因,故D错;患者的情况为低排高阻型休克,心输出量下降,血管收缩,故E错。2.患者属于重度休克,情况危急,首选的治疗措施应是迅速扩充血容量,同时检测生命指标,维持有效循环,防止不可逆损伤,故选B;静脉用强心药物可加大心肌耗氧量,进一步加重心肌损伤,故A错;手术应在患者情况稳定的前提下进行,故C错;利尿剂应在血容量补足的前提下应用,否则进一步造成血容量丢失,故D错;抗生素应用于抗感染,可在生命体征稳定后预防性应用,故E错。

单项选择题

Social-networking sites offer users easy ways to present idealized images of themselves, even if those ideals don’t always square with their real-world personalities. Psychology researcher Soraya Mehdizadeh has discovered a way to poke through the offline-online curtain: she has used Faeebook to predict a person’s level of narcissism and self-esteem.

Mehdizadeh, who conducted the study as an undergraduate at Toronto’s York University, gained access to the Faeebook accounts of 100 college students and measured activities like photo sharing, wall postings and status updates; she also studied how frequently users logged on and how often they remained online during each session. Her findings were published recently in Cyberpsyehology, Behavior and Social Networking.

After measuring each subject using the Narcissism Personality Inventory and Rosenberg Self-Esteem Scale, Mehdizadeh, who graduated from York this past spring, discovered narcissists and people with lower self-esteem were more likely to spend more than an hour a day on Facebook and were more prone to post self-promo-tional photos ( striking a pose or using Photoshop, for example). Narcissists were also more likely to showcase themselves through status updates (using phrases like "I’m so glamorous I bleed glitter") and wall activity (posting self-serving links like " My Celebrity Look-alikes" ).

Self-esteem and narcissism are often interrelated but don’t always go hand in hand. Some psychologists believe that narcissists--those who have a pervasive pattern of grandiosity, a need for admiration, as well as a lack of sympathy--unconsciously inflate their sense of self-importance as a defense against feeling inadequate. Not enough empirical research has been produced to confirm that link, although Mehdizadeh’s study seems to support it. Because narcissists have less capacity to sustain intimate or long-term relationships, Mehdizadeh thinks that they would be more drawn to the online world of virtual friends and emotionally detached communication.

Although it seems that Facebook can be used by narcissists to fuel their inflated egos, Mehdizadeh stops short of proclaiming that excessive time spent on Faeebook can turn regular users into narcissists. She also notes that social-networking sites might ultimately be found to have positive effects when used by people with low self-esteem or depression. "If individuals with lower self-esteem are more prone to using Facebook," she says, "the question becomes, ’ Can Facebook help raise self- esteem by allowing patients to talk to each other and help each other in a socially interactive environment’ I don’t think it’s necessarily a bad thing that people with low self-esteem use Facebook.

Facebook’s users()

A. like to hide themselves

B. maybe show the characters that are different from the real ones

C. (are more likely to) upload the modified photos

D. are often used as the research

填空题