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   37828篇
  免费   8617篇
  国内免费   385篇
耳鼻咽喉   1177篇
儿科学   1098篇
妇产科学   1139篇
基础医学   1508篇
口腔科学   1498篇
临床医学   7335篇
内科学   10326篇
皮肤病学   990篇
神经病学   2824篇
特种医学   1071篇
外科学   6353篇
综合类   200篇
现状与发展   4篇
一般理论   9篇
预防医学   5429篇
眼科学   794篇
药学   994篇
中国医学   6篇
肿瘤学   4075篇
  2024年   240篇
  2023年   1553篇
  2022年   525篇
  2021年   1014篇
  2020年   1917篇
  2019年   726篇
  2018年   1891篇
  2017年   1946篇
  2016年   2297篇
  2015年   2192篇
  2014年   3087篇
  2013年   3629篇
  2012年   1501篇
  2011年   1408篇
  2010年   2131篇
  2009年   2789篇
  2008年   1468篇
  2007年   1189篇
  2006年   1564篇
  2005年   1075篇
  2004年   952篇
  2003年   803篇
  2002年   774篇
  2001年   597篇
  2000年   473篇
  1999年   642篇
  1998年   782篇
  1997年   726篇
  1996年   792篇
  1995年   689篇
  1994年   508篇
  1993年   365篇
  1992年   392篇
  1991年   349篇
  1990年   278篇
  1989年   352篇
  1988年   298篇
  1987年   242篇
  1986年   243篇
  1985年   230篇
  1984年   214篇
  1983年   204篇
  1982年   178篇
  1981年   124篇
  1980年   148篇
  1979年   115篇
  1978年   123篇
  1977年   113篇
  1976年   99篇
  1975年   100篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
22.
As the proportion of racial, ethnic, and cultural minorities in the United States continues to expand, pediatric emergency medicine providers are increasingly likely to encounter cultural and language barriers in practice. This paper reviews a conceptual framework encompassing the decision to seek emergency care, the process of providing such care, and the adherence to treatment plans and follow-up. The ways in which cultural and language barriers can negatively impact each element of this model are discussed in detail. Specific examples include provider ignorance of dangerous folk beliefs, communication barriers secondary to inappropriate interpreter use, and discriminatory assumptions regarding child abuse, pain management, and sexual activity. The practitioner is then provided with concrete recommendations to reduce these negative effects.  相似文献   
23.
24.
25.
26.
Since the mid-1970s, the Margaret Sanger Center of Planned Parenthood of New York City has prepared nurses and nurse midwives from less developed countries to be family-planning nurse practitioners. These nurse practitioners then provide services to patients, train other staff, and manage integrated family-planning clinics. More than 120 nurses and nurse midwives have arrived in groups of 10 at the Sanger Center, with 72 attending since 1981. Each course lasts 10 weeks. The core curriculum provides trainees with skills in women's health care including contraception, in training and advocacy, and in management of clinics. Whether, in the current period of scarce resources, cross-cultural training programs of this type remain a worthwhile investment, and if so, which of their components are most important to this success, is assessed.  相似文献   
27.
Cerebrospinal fluid (CSF) from 7 patients with infantile spasms (mean age: 6.7 months) was collected before and after treatment with adrenocorticotropic hormone (ACTH). The concentration of neurotransmitter metabolites was analyzed using high-performance liquid chromatography and compared to the metabolite concentration in the CSF from 7 age-matched controls (mean age: 6.1 months). Pretreatment levels of CSF 5-hydroxyindoleacetic acid (5-HIAA), homovanillic acid, 3-methoxy-4-hydroxyphenyl glycol (MHPG), and kynurenine were significantly lower in infantile spasm patients compared to controls. Following treatment, marked increases in 5-HIAA and decreases in kynurenine levels were observed in the CSF of the 5 infants whose seizures were eliminated or reduced by ACTH. In the 2 nonresponders 5-HIAA levels decreased. The level of MHPG was reduced slightly in 5 infants, including the 2 nonresponders, and was increased in 2 responders. CSF homovanillic acid levels increased in 4 infantile spasm infants and decreased in 3 following ACTH. These data demonstrate that the presence of seizures in infantile spasms is associated with a significant decrease in serotonergic activity and that elimination of seizures by ACTH is accompanied by increased serotonin turnover. The simultaneous increase of 5-HIAA and decrease of kynurenine, an alternate metabolite of tryptophan, suggests an underlying disturbance of tryptophan metabolism in infantile spasms. The possibility that elimination of seizures by ACTH may be related to decreased production of certain kynurenine metabolites, particularly quinolinic acid, is discussed.  相似文献   
28.
The Low Vision Clinic at the Palmerston North Hospital has now been oerating for 70 years. Over the course of these ten years a number of factors have emerged which can be as readily applied to general ophthalmological practice as to low vision practice. The philosophy of low vision care is one of which all ophthalmologists should be aware and includes factors to be taken into account when dealing with children, people in the workplace, and everyday factors involved in daily living activities, all of which are equally relevant in routine ophthalmological practice. This paper endeavours to share some thoughts on these factors and also discusses means by which the visually handicapped can be helped in areas where specialist low vision services are not readily available.  相似文献   
29.
Pelvic surgery for bladder, colon, prostate, and gynecologic cancers or disease amelioration can affect sexual health and functioning for the long-term or short-term. A person with a permanent diversion is likely to experience longer term adjustment challenges and may suffer from serious sexual dysfunction. Wound, ostomy, and continence nurses caring for the whole person must consider this in their overall care plan. Being prepared with specific information and practical interventions can assist in this endeavor. This article targets sexuality issues for a person with an ostomy and provides suggestions for comprehensive nursing interventions.  相似文献   
30.
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