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   204605篇
  免费   18564篇
  国内免费   4272篇
耳鼻咽喉   3233篇
儿科学   4015篇
妇产科学   3551篇
基础医学   16337篇
口腔科学   7184篇
临床医学   18832篇
内科学   19108篇
皮肤病学   2385篇
神经病学   10196篇
特种医学   5633篇
外国民族医学   11篇
外科学   19948篇
综合类   33052篇
现状与发展   9篇
一般理论   24篇
预防医学   27074篇
眼科学   1986篇
药学   19897篇
  330篇
中国医学   25803篇
肿瘤学   8833篇
  2023年   3948篇
  2022年   6171篇
  2021年   9734篇
  2020年   9926篇
  2019年   11286篇
  2018年   10002篇
  2017年   8584篇
  2016年   7657篇
  2015年   7129篇
  2014年   14073篇
  2013年   14323篇
  2012年   12619篇
  2011年   13499篇
  2010年   10863篇
  2009年   9355篇
  2008年   8661篇
  2007年   8750篇
  2006年   7453篇
  2005年   6294篇
  2004年   5213篇
  2003年   4639篇
  2002年   3561篇
  2001年   2965篇
  2000年   2624篇
  1999年   2115篇
  1998年   1571篇
  1997年   1428篇
  1996年   1144篇
  1995年   1190篇
  1994年   1085篇
  1993年   964篇
  1992年   877篇
  1991年   810篇
  1990年   699篇
  1989年   682篇
  1988年   631篇
  1987年   569篇
  1986年   522篇
  1985年   1783篇
  1984年   2051篇
  1983年   1286篇
  1982年   1706篇
  1981年   1181篇
  1980年   1014篇
  1979年   902篇
  1978年   737篇
  1977年   553篇
  1976年   693篇
  1975年   477篇
  1974年   404篇
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
991.
992.
《Clinical neurophysiology》2020,131(1):259-264
ObjectivesFasciculation potentials (FP) are an important consideration in the electrophysiological diagnosis of ALS. Muscle ultrasonography (MUS) has a higher sensitivity in detecting fasciculations than electromyography (EMG), while in some cases, it is unable to detect EMG-detected fasciculations. We aimed to investigate the differences of FP between the muscles with and without MUS-detected fasciculations (MUS-fas).MethodsThirty-one consecutive patients with sporadic ALS were prospectively recruited and in those, both needle EMG and MUS were performed. Analyses of the amplitude, duration, and number of phases of EMG-detected FPs were performed for seven muscles per patient, and results were compared between the muscles with and without MUS-fas in the total cohort.ResultsThe mean amplitude and phase number of FP were significantly lower in patients with EMG-detected FP alone (0.39 ± 0.25 mV and 3.21 ± 0.88, respectively) than in those with both FP and MUS-fas (1.22 ± 0.92 mV and 3.74 ± 1.39, respectively; p < 0.0001 and p = 0.017, Welch’s t-test).ConclusionSmall FP may be undetectable with MUS. MUS cannot replace EMG in the diagnostic approach for ALS.SignificanceClinicians should use a combination of EMG and MUS for the detection and quantitative analysis of fasciculation in ALS.  相似文献   
993.
Two streams of theory and practice on gender equity have begun to elide. The first is work conducted to change social norms, particularly using theory that emerged from studies in social psychology. The second is work done on gender norms, emerging historically from feminist scholars working to counter gender inequality. As these two streams of work intersect, conceptual clarity is needed to understand differences and similarities between these two traditions. Increased clarity will improve efforts to address harmful norms and practices. In this article, we review similarities and differences between social and gender norms, reviewing the history of the concepts and identifying key tension points of contrast. We identified six areas of comparison that might be helpful for practitioners working for the promotion of global health as they make sense of social and gender norms. We then offer a definition of gender norms for practitioners and researchers working at the intersection between these two theories. Our definition draws from the two different streams of thought of how norms influence people's actions, acknowledging the double nature of gender norms: beliefs nested in people's minds and embedded in institutions that profoundly affect health-related behaviours and shape differential access to health services.  相似文献   
994.
995.
996.
从郁证释义、郁证征象、因郁致病、从郁论治4个方面阐述了郁与儿童性早熟之间的关系,指出郁生百病,儿童性早熟常兼夹郁证,治疗当以疏畅气机、调畅情志为主,为临床治疗儿童性早熟提供了新的辨证思路。附典型案例1则,以资验证。  相似文献   
997.
目的:探讨卿氏湿疹泡洗方2号对血虚风燥型手足慢性湿疹的效果。方法:选取我院2018年1月-2018年9月血虚风燥型手足慢性湿疹患者116例,根据治疗方案不同分为研究组(58例)和参照组(58例),参照组给予卤米松乳膏联合尿素乳膏,研究组给予卿氏湿疹疱洗方2号联合尿素乳膏,比较两组治疗效果、治疗前后湿疹面积及严重度指数(Eczema Area and Severity Index,EASI)、皮肤病生活质量指数(Dermatology life uality Index,DLQI)及不良反应。结果:研究组治疗总有效率为94.83%(55/58),高于参照组82.76%(48/58)(P<0.05);两组治疗后EASI、DLQI评分均低于治疗前,且研究组低于参照组(P<0.05);两组均未见严重不良反应。结论:卿氏湿疹泡洗方2号治疗血虚风燥型手足慢性湿疹患者疗效确切,可明显改善临床症状,缩小湿疹面积,提高患者生活质量,且不增加不良反应,安全性高,值得临床推广应用。  相似文献   
998.
999.
Menopause is generally experienced as a biopsychosocial process involving physiological changes, and influenced by a wide range of psychological, social and cultural factors. The loss of ovarian oestrogen production may cause debilitating symptoms, including hot flushes, night sweats, sleep disturbance, vaginal dryness, dyspareunia, bladder dysfunction, loss of libido, and mood changes. Experience of the menopause transition varies widely between individuals, depending on the age of onset, personal health and wellbeing, social context, environment and culture.Hormone Replacement Therapy (HRT) remains the most effective treatment for the management of vasomotor symptoms and vaginal dryness, but has no proven role in the treatment of chronic diseases of ageing. Treatment should be individualized, and for most healthy women aged 50–59 years the risks of HRT are low. An understanding of the pathophysiology of menopausal symptoms and the risks and benefits of both hormonal and non-hormonal treatments assists in the individual management of patients.  相似文献   
1000.
The importance of diet during pregnancy is critically important for the short‐ and long‐term health of both mother and child. The number of apps targeting pregnant women is rapidly increasing, yet the nutritional content of these tools remains largely unexplored. This review aimed to evaluate the coverage and content of nutrition information in smartphone apps available to U.K. pregnant women. Keyword searches were conducted in iTunes and Google Play stores in November 2018. Candidate apps were included if they targeted pregnant women, provided pregnancy‐specific nutritional information, had a user rating of at least 4+ based on at least 20 ratings, and were available in English. Nutritional content was assessed for accuracy against U.K. recommendations. Behaviour change techniques (BCTs) were also evaluated. Twenty‐nine apps were included, seven of which originated in the United Kingdom. There was a large variability in the quality of smartphone app nutritional information. The accuracy of nutrition information varied, and several apps conveyed inappropriate information for pregnancy. On average, 10 BCTs were identified per app (range 2–15). Overall, smartphone apps do not consistently provide accurate and useful nutritional information to pregnant women. This study highlights the need for the integration of evidence‐based nutritional information during app development and for increased regulatory oversight. App developers should also make it clear that nutritional content is intended for a specific geographical region or population or modify for the intended audience. These are important considerations for the design of future apps, which are increasingly used to complement existing maternity services.  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