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   16058篇
  免费   859篇
  国内免费   124篇
耳鼻咽喉   151篇
儿科学   319篇
妇产科学   351篇
基础医学   1860篇
口腔科学   393篇
临床医学   1215篇
内科学   5034篇
皮肤病学   412篇
神经病学   1282篇
特种医学   290篇
外科学   2232篇
综合类   96篇
一般理论   8篇
预防医学   1047篇
眼科学   300篇
药学   889篇
中国医学   37篇
肿瘤学   1125篇
  2024年   13篇
  2023年   137篇
  2022年   305篇
  2021年   696篇
  2020年   310篇
  2019年   622篇
  2018年   683篇
  2017年   404篇
  2016年   417篇
  2015年   449篇
  2014年   734篇
  2013年   803篇
  2012年   1468篇
  2011年   1475篇
  2010年   766篇
  2009年   687篇
  2008年   1097篇
  2007年   1101篇
  2006年   950篇
  2005年   908篇
  2004年   833篇
  2003年   670篇
  2002年   680篇
  2001年   69篇
  2000年   56篇
  1999年   80篇
  1998年   101篇
  1997年   96篇
  1996年   66篇
  1995年   44篇
  1994年   46篇
  1993年   38篇
  1992年   24篇
  1991年   19篇
  1990年   17篇
  1989年   14篇
  1988年   13篇
  1987年   10篇
  1986年   9篇
  1985年   6篇
  1984年   14篇
  1983年   9篇
  1982年   11篇
  1981年   12篇
  1980年   11篇
  1979年   8篇
  1975年   11篇
  1971年   9篇
  1970年   5篇
  1967年   4篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
23.
Objectives. To describe nurse migration patterns in the Philippines and their benefits and costs.
Principal Findings. The Philippines is a job-scarce environment and, even for those with jobs in the health care sector, poor working conditions often motivate nurses to seek employment overseas. The country has also become dependent on labor migration to ease the tight domestic labor market. National opinion has generally focused on the improved quality of life for individual migrants and their families, and on the benefits of remittances to the nation. However, a shortage of highly skilled nurses and the massive retraining of physicians to become nurses elsewhere has created severe problems for the Filipino health system, including the closure of many hospitals. As a result, policy makers are debating the need for new policies to manage migration such that benefits are also returned to the educational institutions and hospitals that are producing the emigrant nurses.
Conclusions and Recommendations. There is new interest in the Philippines in identifying ways to mitigate the costs to the health system of nurse emigration. Many of the policy options being debated involve collaboration with those countries recruiting Filipino nurses. Bilateral agreements are essential for managing migration in such a way that both sending and receiving countries derive benefit from the exchange.  相似文献   
24.
25.
Computed tomography angiogram of the head and neck has lately become a pivotal imaging modality in the patient with acute stroke symptoms due to its high resolution, accuracy, speed, and sensitivity in the assessment of brain parenchyma and vascular patency.  相似文献   
26.
BACKGROUND Dermatologic procedures often cause some degree of pain. A self-warming patch containing lidocaine and tetracaine (L/T) was developed to provide topical local anesthesia prior to painful procedures.
OBJECTIVES To evaluate the safety and efficacy of a self-warming L/T patch to provide anesthesia in adult patients undergoing minor dermatologic procedures.
METHODS An active or placebo study drug was placed on adults 30 minutes prior to minor dermatologic surgical procedures in a prospectively randomized, double-blinded manner. Subcutaneous lidocaine injection was available during the procedure as a rescue medication if requested by the subject. Immediately following the procedure, the subjects, the investigator, and an independent observer rated pain intensity and adverse events were recorded.
RESULTS Patient-reported pain intensity was significantly lower in the L/T patch group (   p < .001  ). Investigators and an independent observer rated the pain in the L/T patch group to be less than in the placebo patch group (   p = .004  and   p < .001  , respectively). Forty-nine percent of patients in the placebo group required rescue subcutaneous lidocaine compared with 22% in the L/T patch study group (   p = .008  ). One patient in the L/T patch group reported a transient moderate burning sensation.
CONCLUSION The self-warming L/T patch was effective in providing clinically useful local anesthesia for minor dermatologic procedures in adult patients.
ZARS, INC., PROVIDED SUPPORT VIA A SPONSORED RESEARCH GRANT TO THE UNIVERSITY OF MIAMI.  相似文献   
27.
To examine the relationship between demographic, clinical and psychosocial variables and diabetes self-care management in Mexican type 2 diabetic patients. Cross-sectional study of 176 consecutive patients with type 2 diabetes aged 30-75 years, attending a tertiary health-care center in Mexico City. A brief medical history and previously validated questionnaires were completed. The study group consisted of 64 males/112 females, aged 55 +/- 11 years, mean diabetes duration of 12 +/- 8 years and HbA1c of 9.0 +/- 2.0%, 78.4% reported following the correct dose of diabetes pills or insulin, 58% ate the recommended food portions, and 44.3% did exercise three or more times per week. A good adherence to these three recommendations was observed in only 26.1% of the patients. These patients considered as a group were characterized by a greater knowledge about the disease (P < 0.00001), regular home blood glucose monitoring (P < 0.01), an inner perception of better diabetes control (P = 0.007), good health (P = 0.004) and better communication with their physician (P < 0.02). A poor adherence to two or the three main diabetes care recommendations was associated with a depressive state (OR 2.38, 95% CI 1.1-4.9, P < 0.01) and a history of excessive alcohol intake (OR 4.03, 95% CI 1.1-21.0, P = 0.03). Poor adherence to standard diabetes care recommendations is frequently observed in patients with type 2 diabetes attending a specialized health care center in Mexico City. Depression must be identified and treated effectively.  相似文献   
28.
Gene expression regulation and cancer   总被引:1,自引:0,他引:1  
  相似文献   
29.
30.
OBJECTIVE: Several studies have shown that repetitive transcranial magnetic stimulation (rTMS) over the dorsolateral prefrontal cortex (DLPFC) is effective in the treatment of depression in patients with Parkinson disease (PD). However, since research into the effect of this type of rTMS regime on motor function is limited, we studied the effect of rTMS over the DLPFC on the motor functions in PD patients. METHODS: Thirteen patients were randomly assigned into 2 groups, one receiving real-rTMS (90% of resting motor threshold, 10 Hz, 450 pulses-day for 10 consecutive days) over the DLPFC contralateral to the more affected side, and the other group receiving sham-rTMS. Assessment included a clinical motor evaluation using part III of the Unified Parkinson's Disease Rating Scale (UPDRS), and several motor tasks. The UPDRS was applied before and after 10 days of rTMS. Finger tapping, reach movement, grip movement and gait were measured in each session before and after the rTMS over the 10 day period. RESULTS: Statistical analysis (ANOVA for repeated measures; group *day *side *rTMS) only showed a significant effect for finger tapping, reach movement and gait for the factor day. No significant change was reported for the UPDRS in any group. CONCLUSIONS: Application of rTMS over the DLPFC as a 10 day course had no significant effect on motor functions and clinical motor status, and the improvement in performance of motor tasks can be attributed to the effects of practice. SIGNIFICANCE: rTMS over the DLPFC did not lead to any motor improvement in PD patients.  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