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   12554篇
  免费   1228篇
  国内免费   66篇
耳鼻咽喉   201篇
儿科学   64篇
妇产科学   84篇
基础医学   756篇
口腔科学   6658篇
临床医学   508篇
内科学   1511篇
皮肤病学   182篇
神经病学   383篇
特种医学   346篇
外科学   1611篇
综合类   14篇
预防医学   209篇
眼科学   40篇
药学   311篇
中国医学   7篇
肿瘤学   963篇
  2024年   32篇
  2023年   393篇
  2022年   92篇
  2021年   212篇
  2020年   221篇
  2019年   157篇
  2018年   371篇
  2017年   438篇
  2016年   493篇
  2015年   580篇
  2014年   641篇
  2013年   648篇
  2012年   580篇
  2011年   586篇
  2010年   571篇
  2009年   733篇
  2008年   562篇
  2007年   581篇
  2006年   546篇
  2005年   497篇
  2004年   434篇
  2003年   463篇
  2002年   437篇
  2001年   296篇
  2000年   272篇
  1999年   247篇
  1998年   285篇
  1997年   257篇
  1996年   249篇
  1995年   221篇
  1994年   211篇
  1993年   150篇
  1992年   182篇
  1991年   120篇
  1990年   123篇
  1989年   97篇
  1988年   118篇
  1987年   116篇
  1986年   71篇
  1985年   90篇
  1984年   78篇
  1983年   66篇
  1982年   62篇
  1981年   44篇
  1979年   22篇
  1978年   19篇
  1975年   21篇
  1974年   22篇
  1972年   17篇
  1969年   18篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
During the treatment of patients with renal failure or renal transplants the most important consideration is to eliminate sources of infection before and after the treatment. Acute or chronic oral infections or bacteraemias resulting from dental procedures may cause serious complications in these patients who already have lowered host resistance caused by immunosuppressant therapy. In order to determine the latest concepts from some international transplantation centres relating to the importance of and the effect of infective sources in the oral cavity, a survey form was prepared which included several questions related to oral foci of infection and renal transplantations.
Results obtained from 22 centres from 12 countries indicated that the majority of the centres included a dental examination in their routine protocol and required completion of any necessary dental treatment before transplantation. However, full agreement among all these centres on the necessity for dental examination as part of the protocol has not yet been reached.  相似文献   
52.
53.
A patient with Type I hypoplastic patterned amelogenesis imperfecta, subtype D, presented for prosthodontic evaluation. This article describes the developmental and pathophysiological background of this disease. A clinical report describing the diagnosis, treatment planning, and dental rehabilitation of the patient is reviewed.  相似文献   
54.
Most cases with recurrent parotitis in childhood (RPC) can be cured before puberty.1–3 A few of them, however, may continue to adulthood.1–4 To distinguish this condition from other types of chronic parotitis in adults, such as chronic obstructive parotitis,5 we suggest that the diagnosis of recurrent parotitis in adults (RPA) be reserved for the cases derived from RPC.6 The pathophysiology and development of RPA is still not well known. To our knowledge, there are few reports of RPA in the literature, especially concerning its histopathology. This report describes a cases of RPA studied with sialography and light and electron microscopy.  相似文献   
55.
p = 0.0007) and tumor necrosis (TN) (HMC: p = 0.0050). Univariate analysis showed that AMC or HMC was a statistically significant predictor of overall survival in all patients ( p = 0.0086 and p = 0.0307, respectively). Multivariate analysis showed that AMC was an independent predictor of node status when we fitted a model with node status, BVI, and either AMC or HMC; but HMC was not independent. However, when we fitted a model including all 11 of the other indicators and AMC or HMC, the node status, HG, and LI were independent predictors, but AMC and HMC were not. Although AMC was a better method than HMC for evaluating angiogenesis, we cannot confirm angiogenesis as a significant independent prognostic factor associated with long-term survival in Japanese breast cancer patients.  相似文献   
56.
Comparison of the use of nalbuphine and fentanyl during third molar surgery   总被引:1,自引:0,他引:1  
In a double-blind, randomized plan of drug administration, nalbuphine, fentanyl, and a placebo were compared for efficacy in sedation and analgesia during third molar removal. Fifty-eight patients participated in this study. Using accepted intravenous sedation and surgical techniques, fentanyl and nalbuphine were found to be better than placebo for anxiety and pain control in third molar surgery. Fentanyl had a longer duration of pain relief postoperatively than did nalbuphine. The study confirmed the need for a narcotic supplement to sedation techniques for third molar surgery.  相似文献   
57.
Many care-dependent elderly individuals live in nursing homes and must depend on nursing home aides for oral hygiene care. It is generally agreed that the level of oral hygiene care among care-dependent nursing home residents is less than optimal. Two reasons are time constraints and the difficulty involved in brushing other individuals' teeth. The identification of effective and efficient plaque-removal devices for use by care-providers should make it easier for nursing home aides to incorporate effective oral hygiene care into their daily routines. This pilot study was undertaken to determine the relative effectiveness of four plaque removal devices with different basic designs when used by a non-professional careprovider on 10 healthy volunteers. A brush with curved bristles on the lateral aspect of the brush head and short straight bristles in the center (Collis-curve) and an electric toothbrush with tuffs that rotate reciprocally (Interplak) were the most effective, a conventional brush (Oral-B) was somewhat less effective, and a disposable foam brush (Abco) was least effective and similar to the prebrushing plaque score (baseline). All the volunteers reported that the Collis-curve as the most comfortable brush, and the care-provider reported that it was the easiest to use.  相似文献   
58.
59.
60.
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