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   1387145篇
  免费   110192篇
  国内免费   9792篇
耳鼻咽喉   19378篇
儿科学   45698篇
妇产科学   37210篇
基础医学   194781篇
口腔科学   35508篇
临床医学   125781篇
内科学   274426篇
皮肤病学   29340篇
神经病学   106071篇
特种医学   55280篇
外国民族医学   730篇
外科学   207900篇
综合类   45526篇
现状与发展   25篇
一般理论   381篇
预防医学   102347篇
眼科学   31298篇
药学   106649篇
  113篇
中国医学   8331篇
肿瘤学   80356篇
  2021年   12204篇
  2019年   13062篇
  2018年   17134篇
  2017年   13542篇
  2016年   14256篇
  2015年   17459篇
  2014年   23543篇
  2013年   32139篇
  2012年   44635篇
  2011年   47556篇
  2010年   28601篇
  2009年   26401篇
  2008年   42898篇
  2007年   45516篇
  2006年   45814篇
  2005年   44744篇
  2004年   41856篇
  2003年   40397篇
  2002年   39114篇
  2001年   66702篇
  2000年   69255篇
  1999年   59211篇
  1998年   16440篇
  1997年   15032篇
  1996年   14889篇
  1995年   14815篇
  1994年   13945篇
  1993年   12523篇
  1992年   45588篇
  1991年   44409篇
  1990年   43035篇
  1989年   40826篇
  1988年   37506篇
  1987年   36810篇
  1986年   34030篇
  1985年   32677篇
  1984年   24324篇
  1983年   20366篇
  1982年   11787篇
  1981年   10734篇
  1979年   21397篇
  1978年   14827篇
  1977年   12516篇
  1976年   11707篇
  1975年   12637篇
  1974年   14688篇
  1973年   14134篇
  1972年   12955篇
  1971年   11735篇
  1970年   11053篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
近年来虚拟现实技术被引入医疗领域,成为疼痛管理的新形式,但目前在我国儿童疼痛管理中的应用较少。本研究从虚拟现实技术的概述、设备种类与使用方式、干预效果3个部分进行综述,以期为我国虚拟现实技术在儿童疼痛管理中的临床实践提供参考。  相似文献   
33.
Tumor metastasis is a singularly important determinant of survival in most cancers. Historically, radiation therapy (RT) directed at a primary tumor mass was associated infrequently with remission of metastasis outside the field of irradiation. This away-from-target or “abscopal effect” received fringe attention because of its rarity. With the advent of immunotherapy, there are now increasing reports of abscopal effects upon RT in combination with immune checkpoint inhibition. This sparked investigation into underlying mechanisms and clinical trials aimed at enhancement of this effect. While these studies clearly attribute the abscopal effect to an antitumor immune response, the initial molecular triggers for its onset and specificity remain enigmatic. Here, we propose that DNA damage–induced inflammation coupled with neoantigen generation is essential during this intriguing phenomenon of systemic tumor regression and discuss the implications of this model for treatment aimed at triggering the abscopal effect in metastatic cancer.  相似文献   
34.
35.
ObjectiveTo examine the screening rates for kidney damage and function among patients with type 2 diabetes (T2D) and chronic kidney disease stage at diabetes diagnosis using a US administrative claims database.Patients and MethodsThis cohort study used a claims database enriched with laboratory results data. Patients with T2D (defined as 1 inpatient or 2 outpatient claims for diabetes), aged 18 years or older, and with at least 1 year of follow-up enrollment were identified. Patients with type 1 diabetes, kidney disease, or other related conditions at baseline were excluded. We estimated screening rates using laboratory orders for serum creatinine and estimated glomerular filtration rate (eGFR) measurement and urine albumin to creatinine ratio (UACR). Chronic kidney disease severity was reported using the Kidney Disease: Improving Global Outcomes classification based on laboratory results.ResultsA total of 1,881,447 patients with T2D were eligible for analysis. Mean ± SD age was 63.1±13.1 years; 947,150 patients (50.3%) were male. Serum creatinine tests were ordered within 14 days of the index date among 290,722 patients of 622,915 (46.7%) patients with newly-recognized T2D. Overall, 1,595,964 patients (84.8%) had at least one serum creatinine test ordered during the 1-year follow-up period. Fewer patients received a UACR test during follow-up (814,897 [43.3%]). Less than half of all patients with T2D received a laboratory test order for both serum creatinine and urine albumin measurements during the follow-up period.ConclusionPhysicians treating patients with diabetes are selectively adhering to chronic kidney disease screening guidelines, as indicated by high rates of eGFR testing, but less frequent UACR testing. Despite recommendations to monitor both eGFR and UACR, less than half of patients were screened for albuminuria during the 1-year follow-up.  相似文献   
36.
37.
38.
39.
ObjectiveAssisted oocyte activation combined with ICSI (ICSI-AOA) has been reported to improve fertilization outcomes of couples with oocyte activation deficiency (OAD). Although there's no sufficient evidence to support ICSI-AOA as routine use, it might be beneficial for POSEIDON group 3 patients with suspected oocyte-related OAD.Case reportA 29-year-old female presented with a history of primary infertility for two years. She was classified as a POSEIDON group 3 patient and had a total fertilization failure history. With the help of ICSI-AOA, six oocytes were successfully fertilized. Pregnancy was later confirmed after embryo transfer. A living infant was born after 34 weeks of pregnancy.ConclusionOAD should be taken into consideration for POSEIDON group 3 patients since low Antimüllerian hormone is associated decreased quality. Further research needs to be done to understand the mechanism underlying oocyte-related OAD and the potential role of ICSI-AOA in young patients with suboptimal ovarian response.  相似文献   
40.
生物钟节律观与中医“天人一体”观相契合,生物钟节律紊乱可影响人体的生理病理状态,通过调节生物钟节律可达到提高治疗效果的目的。生物钟节律系统包括中枢生物钟节律系统与外周生物节律系统两大系统,分别在疾病发生发展中发挥不同的作用。与之相应,择时疗法是根据人体气血阴阳节律变化而选择相应药物治疗以达到最佳的疗效的一种时间医学治疗方法。临床上许多前列腺癌患者的发病与生物钟节律紊乱密切相关,通过调整生物钟节律具有预防和改善前列腺癌预后的积极作用。因此,本文将以现代生物钟节律的生理及病理机理为切入点,探讨不同生物钟节律系统紊乱在促前列腺癌中医主证形成过程中的发生机理,进而探讨择时治疗策略在不同类型前列腺癌治疗中运用的可行性,以期对前列腺癌的防治及预后产生一定的影响。  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