搜题请搜索小程序“爱下问搜题”
问题 单项选择题

2岁患儿，平时身体较弱，夜间睡眠时突然发生喉喘鸣、吸气性呼吸困难，出冷汗，面色发绀，呈窒息状1～2min后缓解，发作时及发作后均无声嘶及发热。颈、肺部听诊无阳性体征。首先应考虑为（）。

A.小儿急性喉炎

B.先天性喉喘鸣

C.小儿喉痉挛

D.癔症

E.气管、支气管异物

答案

参考答案：C

解析：小儿喉痉挛多见于2～3岁婴幼儿，可能与缺钙有关，多发生于营养不良、体弱或佝偻病的儿童，常在夜间突然发生，发作时有吸气性呼吸困难和喉喘鸣，发作时间短暂，仅数秒甚至1～2min，可反复发作并可连续发作，但发作时及发作后均无声音嘶哑。

单项选择题

中心静脉压正常值的范围是

A．2～3cmH2O

B．3～4cmH2O

C．4～5cmH2O

D．5～6cmH2O

E．6～12cmH2O
查看答案
问答题

　　Marlene Castro knew the tall blonde woman only as Laurene， her mentor. They met every few weeks in a rough Silicon Valley neighborhood the year that Ms. Castro was applying to college， and they e-mailed often， bonding over conversations about Ms. Castro’s difficult childhood. Without Laurene’s help， Ms. Castro said， she might not have become the first person in her family to graduate from college.　　It was only later， when she was a freshman at University of California， Berkeley， that Ms. Castro read a news article and realized that Laurene was Silicon Valley royalty， the wife of Apple’s co-founder， Steven P. Jobs.　　“I just became 10 times more appreciative of her humility and how humble she was in working with us in East Palo Alto，” Ms. Castro said.　　The story， friends and colleagues say， is classic Laurene Powell Jobs. Famous because of her last name and fortune， she has always been private and publicity-averse. Her philanthropic work， especially on education causes like College Track， the college prep organization she helped found and through which she was Ms. Castro’s mentor， has been her priority and focus.　　Now， less than two years after Mr. Jobs’s death， Ms. Powell Jobs is becoming somewhat less private. She has tiptoed into the public sphere， pushing her agenda in education as well as global conservation， nutrition and immigration policy.　　“She’s been mourning for a year，” said Larry Brilliant， who is an old friend of Mr. Jobs. “Her life was about her family and Steve， but she is now emerging as a potent force on the world stage， and this is only the beginning.”But she is doing it her way.　　“It’s not about getting any public recognition for her giving， it’s to help touch and transform individual lives，” said Laura Andreessen， a philanthropist and lecturer on philanthropy at Stanford who has been close friends with Ms. Powell Jobs for two decades.　　While some people said Ms. Powell Jobs should have started a foundation in Mr. Jobs’s name after his death， she did not， nor has she increased her public giving.　　Instead， she has redoubled her commitment to Emerson Collective， the organization she formed about a decade ago to make grants and investments in education initiatives and， more recently， other areas.　　“In the broadest sense， we want to use our knowledge and our network and our relationships to try to effect the greatest amount of good，” Ms. Powell Jobs said in one of a series of interviews with The New York Times.
查看答案