首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2685篇
  免费   164篇
  国内免费   7篇
耳鼻咽喉   18篇
儿科学   43篇
妇产科学   74篇
基础医学   384篇
口腔科学   48篇
临床医学   266篇
内科学   695篇
皮肤病学   69篇
神经病学   269篇
特种医学   98篇
外科学   241篇
综合类   19篇
一般理论   4篇
预防医学   322篇
眼科学   29篇
药学   125篇
肿瘤学   152篇
  2023年   21篇
  2022年   8篇
  2021年   43篇
  2020年   32篇
  2019年   61篇
  2018年   48篇
  2017年   54篇
  2016年   49篇
  2015年   71篇
  2014年   65篇
  2013年   110篇
  2012年   221篇
  2011年   218篇
  2010年   114篇
  2009年   89篇
  2008年   189篇
  2007年   186篇
  2006年   165篇
  2005年   152篇
  2004年   144篇
  2003年   139篇
  2002年   127篇
  2001年   76篇
  2000年   76篇
  1999年   83篇
  1998年   25篇
  1997年   12篇
  1996年   17篇
  1995年   19篇
  1994年   19篇
  1993年   9篇
  1992年   28篇
  1991年   19篇
  1990年   17篇
  1989年   17篇
  1988年   17篇
  1987年   17篇
  1986年   15篇
  1984年   11篇
  1983年   9篇
  1982年   5篇
  1981年   5篇
  1980年   3篇
  1979年   6篇
  1978年   4篇
  1977年   5篇
  1973年   3篇
  1972年   7篇
  1971年   3篇
  1969年   4篇
排序方式: 共有2856条查询结果,搜索用时 31 毫秒
1.
2.
3.
Since the introduction of cART (combination antiretroviral therapy), HIV has evolved into a chronic disease such that it requires lifelong medical treatment to which patients must adhere. Communication with health care providers is pivotal in supporting patients to adapt to having HIV and adhering to treatment, in order to maintain health and quality of life. Previous research indicates that communication is optimal when it matches patient preferences for information exchange, relationship establishment, and involvement in treatment decisions. The aim of the present study is to explore HIV patient communication preferences as well as patient experiences with their providers (not) matching their preferences. A second aim is to explore provider beliefs about patient preferences and provider views on optimal communication. Data were collected through interviews with 28 patients and 11 providers from two academic hospitals. Results indicate that patient preferences reflect their cognitive, emotional, and practical needs such that patients look to increase their sense of control over their HIV. Patients aim to further increase their sense of control (by proxy) through their relationship with their providers and through their decisional involvement preferences. Providers are well aware of patient communication preferences but do not explicate underlying control needs. Implications for clinical practice are discussed.  相似文献   
4.
5.
6.
Although airbags are designed to save lives and protect victims from serious injuries, airbag deployment can cause unwanted lesions. In this case report, two cases are presented of young women who sustained an important fracture dislocation of the first carpometacarpal joint (CMC I joint) caused by airbag deployment during a car collision.  相似文献   
7.
A 3-yr randomized, controlled prospective study evaluated the clinical effectiveness of a mild two-step self-etch adhesive, Clearfil SE, in Class-V non-carious lesions. The hypothesis tested was that prior selective etching of enamel with phosphoric acid does not affect the 3-yr clinical performance of this adhesive. A total of 100 lesions in 29 patients were randomly restored in one or two pairs, according to two experimental protocols: (i) application of Clearfil SE according to the instructions of the manufacturer (C-SE non-etch); and (ii) similar application of Clearfil SE with prior etching of enamel cavity margins with phosphoric acid (C-SE etch). Clearfil AP-X was used as a restorative material. At 3 yr, 90% of the restorations were examined for retention, marginal integrity, marginal discoloration, caries recurrence, postoperative sensitivity, and preservation of tooth vitality. An excellent retention rate (100%) was noted after 3 yr of clinical functioning. Only one restoration of the C-SE etch group was clinically unacceptable owing to the presence of a severe cervical marginal defect. A pairwise comparison between both groups showed a significant difference only in the number of small marginal defects at the enamel side, which was higher in the C-SE non-etch group. These incisal defects were small and clinically irrelevant. Superficial marginal discoloration increased slightly in the C-SE non-etch group and was related to the higher frequency of small incisal marginal defects. In this latter group, localized marginal discoloration was observed significantly more in smokers. In conclusion, the clinical performance of the mild two-step self-etch adhesive, Clearfil SE, remained excellent after 3 yr of clinical functioning. Additional etching of the enamel cavity margins was not critical for its clinical performance.  相似文献   
8.
Surgical Endoscopy - Single-visit (SV) totally extraperitoneal (TEP) inguinal hernia repair is an efficient service without impairment of safety or complication rate. Data on the economic impact of...  相似文献   
9.
10.
Objective To determine the impact of elimination of daily routine chest radiographs (CXRs) in a mixed medical–surgical intensive care unit (ICU) on utility of on demand CXRs, length of stay (LOS) in ICU, readmission rate, and mortality rate. Design and setting Prospective, nonrandomized, controlled study in a 28-bed ICU. Analysis included data of all admitted ICU patients during 5 months before and after elimination of daily routine CXRs. Results Before elimination, 2457 daily routine CXRs and 1437 on demand CXRs were obtained from 754 patients. After elimination, 1267 CXRs were obtained from 622 patients. The ratio of CXRs/patient day decreased from 1.1 ± 0.3 to 0.6 ± 0.4 (p < 0.05). Elimination did not result in a change in utility and timing of on demand CXRs. The absolute diagnostic and therapeutic value of on demand CXRs increased with elimination of daily routine CXRs: before intervention, 147 unexpected predefined abnormalities were found (10.2% of all on demand CXRs in 15.9% of all patients), of which 57 (3.9%) in 6.4% of all patients led to a change in therapy. After intervention, 156 unexpected predefined abnormalities were found (11.6%; p < 0.05), of which 61 (4.8%) in 9.5% of all patients (p < 0.05) led to a change in therapy. The LOS in ICU, readmission rate and ICU, and hospital mortality rate were not influenced by the change in strategy. Conclusions Elimination of daily routine CXRs reduced the number of CXRs in a mixed medical–surgical ICU, while not affecting readmission rate and ICU and hospital mortality rates. Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号