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   1615215篇
  免费   135066篇
  国内免费   2605篇
耳鼻咽喉   21810篇
儿科学   53586篇
妇产科学   46565篇
基础医学   229928篇
口腔科学   47526篇
临床医学   142673篇
内科学   317700篇
皮肤病学   34203篇
神经病学   131710篇
特种医学   65270篇
外国民族医学   474篇
外科学   245972篇
综合类   39981篇
现状与发展   3篇
一般理论   555篇
预防医学   124613篇
眼科学   36774篇
药学   122351篇
  2篇
中国医学   2994篇
肿瘤学   88196篇
  2018年   15082篇
  2016年   13143篇
  2015年   15291篇
  2014年   21100篇
  2013年   32076篇
  2012年   43517篇
  2011年   45673篇
  2010年   26893篇
  2009年   25777篇
  2008年   43896篇
  2007年   46210篇
  2006年   46918篇
  2005年   45565篇
  2004年   44960篇
  2003年   43055篇
  2002年   42151篇
  2001年   75954篇
  2000年   78629篇
  1999年   66686篇
  1998年   17936篇
  1997年   16506篇
  1996年   16494篇
  1995年   16186篇
  1994年   15228篇
  1993年   14372篇
  1992年   55639篇
  1991年   53954篇
  1990年   52761篇
  1989年   51032篇
  1988年   47378篇
  1987年   46740篇
  1986年   44471篇
  1985年   43019篇
  1984年   32200篇
  1983年   27724篇
  1982年   16278篇
  1981年   14580篇
  1980年   13670篇
  1979年   30607篇
  1978年   21186篇
  1977年   17854篇
  1976年   16785篇
  1975年   17671篇
  1974年   21579篇
  1973年   20759篇
  1972年   18935篇
  1971年   17850篇
  1970年   16371篇
  1969年   15340篇
  1968年   14016篇
排序方式: 共有10000条查询结果,搜索用时 234 毫秒
111.
An association between juvenile xanthogranuloma (JXG), neurofibromatosis type 1 (NF1), and juvenile myelomonocytic leukemia (JMML) has been described in the literature but has only been documented in approximately 20 cases. We diagnosed a patient with NF1 at 25 months of age, before any cutaneous stigmata of this disease had appeared, because we decided to screen for the NF1 gene mutation because of his presentation with multiple JXGs and moderate macrocephaly (2.5 standard deviations) at 9 months of age and JMML diagnosed at 20 months of age. The child is well today after treatment with chemotherapy and allogenic bone marrow transplantation. With increased awareness, patients with JXG and NF1 who develop symptoms possibly related to JMML, such as paleness, skin bleeding, cough, unexplained fever, and hepatosplenomegaly, should be further evaluated. We also emphasize that multiple JXG lesions can be an early marker of NF1.  相似文献   
112.
113.
114.
On 8 April 2014, a US jury ordered Takeda and Eli Lilly to pay $9 bn in punitive damages after finding that they had concealed the cancer risks associated with pioglitazone. By contrast, on 28 August 2014, the long‐awaited outcome of the 10‐year Kaiser Permanente Northern California study was announced. That study was specifically designed to investigate whether patients exposed to pioglitazone were at an increased risk of bladder cancer and found no association; thus, at last, the controversial issue has been resolved. A review, in retrospect, of the story of the proposed link between pioglitazone and bladder cancer reveals flaws at every stage. In 2012, a BMJ editorial, in keeping with some other contemporary reports, stated ‘it can confidently be assumed that pioglitazone increases the risk of bladder cancer’. Examination of the information which led to such a statement shows that: 1) the pre‐clinical findings of bladder cancer in male rats is not indicative of human risk; 2) there is no association between bladder cancer and pioglitazone in randomized controlled trials, once cases that could not plausibly be related to treatment are removed; and 3) the observational studies that have suggested a link have over‐extrapolated from the data: pioglitazone‐treated patients had more risk factors for bladder cancer than those not treated with pioglitazone. Meanwhile careful study of randomized controlled trials shows evidence of cardiovascular benefit from pioglitazone in Type 2 diabetes, a condition which results, more than anything, in premature cardiovascular death and morbidity.  相似文献   
115.
116.
While peer support has been investigated in multiple clinical contexts, its application to the postpartum setting is unknown. The aim was to assess acceptability of a postpartum peer support program for women with diabetes. Observational survey-based needs assessment of forty low-income women with diabetes, receiving care at a major medical institution. Mean age and gravidity were 30.7 years and 3.15 ± 1.67 respectively. 45 % expressed interest in a “buddy.” There was no significant difference between groups desiring and not desiring this program. A majority of respondents desired telephone, text messaging, and in-person contacts (79.2, 72.1, 83.8 %), with 72.5 % of patients desiring diabetes-related activities during clinic waiting time. Many women desire a postpartum diabetes reciprocal peer program for support outside of clinician visits. Patients are receptive to educational services during their wait and outside of clinic time, a potentially valuable opportunity to share important health information.  相似文献   
117.
118.
Graefe's Archive for Clinical and Experimental Ophthalmology - Retinal microvascular endothelial dysfunction is thought to be of importance in the development of ocular vascular diseases....  相似文献   
119.
120.
The term “oligometastatic prostate cancer” refers to a heterogeneous group of disease states currently defined solely on the basis of clinical features. Oligorecurrent disease, de novo oligometastases, and oligoprogressive disease likely have unique biologic underpinnings and natural histories. Evidence suggesting the existence of a subset of patients who harbor prostate cancer with limited metastatic potential currently includes disparate and overwhelmingly retrospective reports. Nevertheless, emerging prospective data have corroborated the “better-than-expected,” retrospectively observed outcomes, particularly in the setting of oligorecurrent prostate cancer. Improved functional imaging with prostate-specific membrane antigen-targeted strategies may enhance the identification of patients with oligometastatic prostate cancer in the short term. In the long term, refinement of the oligometastatic case definition likely will require biologic risk-stratification schemes. To determine optimal treatment strategies and identify patients most likely to benefit from metastasis-directed therapy, future efforts should focus on conducting high-quality, prospective trials with much-needed molecular correlative studies.  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