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   5606篇
  免费   618篇
  国内免费   168篇
耳鼻咽喉   55篇
儿科学   240篇
妇产科学   152篇
基础医学   153篇
口腔科学   88篇
临床医学   1232篇
内科学   1257篇
皮肤病学   113篇
神经病学   341篇
特种医学   189篇
外科学   1600篇
综合类   15篇
预防医学   329篇
眼科学   326篇
药学   68篇
肿瘤学   234篇
  2023年   107篇
  2021年   78篇
  2020年   98篇
  2019年   46篇
  2018年   131篇
  2017年   175篇
  2016年   182篇
  2015年   140篇
  2014年   232篇
  2013年   299篇
  2012年   98篇
  2011年   116篇
  2010年   228篇
  2009年   339篇
  2008年   118篇
  2007年   65篇
  2006年   106篇
  2005年   71篇
  2003年   45篇
  2002年   46篇
  2001年   112篇
  2000年   71篇
  1999年   135篇
  1998年   180篇
  1997年   202篇
  1996年   308篇
  1995年   256篇
  1994年   197篇
  1993年   124篇
  1992年   126篇
  1991年   143篇
  1990年   68篇
  1989年   137篇
  1988年   106篇
  1987年   85篇
  1986年   107篇
  1985年   85篇
  1984年   89篇
  1983年   77篇
  1982年   69篇
  1981年   67篇
  1980年   86篇
  1979年   45篇
  1978年   62篇
  1977年   45篇
  1976年   43篇
  1975年   47篇
  1972年   38篇
  1964年   49篇
  1963年   47篇
排序方式: 共有6392条查询结果,搜索用时 78 毫秒
1.
2.
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   
3.
OBJECTIVE: Our purpose was to assess whether legislative action influenced the role of obstetrician-gynecologists as primary care physicians. STUDY DESIGN: An observational study was performed on the basis of a questionnaire sent to 410 obstetrician-gynecologists and 27 medical directors of managed-care organizations. RESULTS: Of 67% of obstetrician-gynecologists and 96% of medical directors who responded, there was agreement as to the content of primary care, but a minority (38%) of obstetrician-gynecologists identified themselves as primary care providers. A minority of medical directors (35%) felt that obstetrician-gynecologists should serve in that role. Both obstetrician-gynecologists and medical directors felt that legislation had little impact. CONCLUSION: The reticence of obstetrician-gynecologists to assume a major role in primary care appears to be the result of an uneasiness with accepting a more comprehensive role in patient management and gatekeeping. They appear comfortable with the more traditional roles but feel that training and experience has not prepared them well for the management of more complex medical problems. (Am J Obstet Gynecol 1998;178:1222-8.)  相似文献   
4.
Over recent years the pharmacological treatment strategy for rheumatoid arthritis (RA) has changed. An early, aggressive approach has been adopted with a view to maintaining functional capacity. The changing role of nonsteroidal antiinflammatory agents is discussed in the light of the potential toxicity of this class of drugs. The current use of second-line agents is dealt with in depth and includes guidelines to patient monitoring. Particular attention has been paid to the growing use of cyclosporin A in the treatment of RA as this drug represents the newest, most potent, nonexperimental form of treatment. The questions of when to introduce second-line agents, who should receive treatment and how many drugs should be prescribed are all addressed in this review. The relative efficacy and toxicity of these agents is discussed and a treatment protocol is proposed.  相似文献   
5.
The psychosocial impact of war trauma and torture on Southeast Asian refugees   总被引:12,自引:0,他引:12  
More than 700,000 refugees from Southeast Asia have settled in the United States since 1975. Although many have suffered serious trauma, including torture, few clinical reports have described their trauma-related symptoms and psychosocial problems. The authors conducted a treatment study of 52 patients in a clinic for Indochinese. They found that these patients were a highly traumatized group; each had experienced a mean of 10 traumatic events and two torture experiences. Many of the patients had concurrent diagnoses of major affective disorder and posttraumatic stress disorder as well as medical and social disabilities associated with their history of trauma. The authors also found that Cambodian women without spouses demonstrated more serious psychiatric and social impairments than all other Indochinese patient groups.  相似文献   
6.
Akathisia as a side-effect of metoclopramide has received increasing attention in consultation-liaison psychiatry in recent years. A case of metoclopramide-induced akathisia resulting in a suicide attempt is reported in order to highlight the suffering of such patients and the factors that lead to misdiagnosis.  相似文献   
7.
8.
Hypothermia and preservative perfusates have been used to decrease ischemic renal injury. This study was performed to identify the preservative function of perfusates independent of the effects of hypothermia. Rats underwent 45 minutes of renal ischemia. Rectal and renal parenchyma temperatures were monitored and maintained within 1° C of normal. Perfusates were University of Wisconsin solution (UW), Euro-Collins solution, normal saline solution, and Ringer's lactate solution. A nonperfused ischemic control and a nonischemic control group were also evaluated. Parameters evaluated included serum creatinine and blood urea nitrogen levels, renal ischemic injury grade, renal weight, and gross appearance of the injured kidney. Rats treated with UW solution were found to have a significantly lower creatinine, blood urea nitrogen, and injury grade than the other three perfused groups. The external gross appearance of the UW-treated kidneys was normal, whereas that of the other groups demonstrated moderate to severe injury. Although the mean right/left renal weight difference of the UW-treated group was lower than that of the other three groups, this was not statistically significant. Under normothermic conditions in rats, UW solution affords significant renal protection from ischemia. Euro-Collins, normal saline, and Ringer's lactate solutions display no significant protective effect.Presented at the Twentieth Annual Meeting of the Peripheral Vascular Surgery Society, New Orleans, La., June 10, 1995.  相似文献   
9.
A double-blind randomised study was performed to assess the value of the addition of pethidine 50 mg to the initial dose of bupivacaine given for epidural analgesia in labour. Forty-nine patients received either 1 ml of saline (n = 24), or 50 mg of pethidine (n = 25), added to 9 ml of 0.25% bupivacaine as an initial injection for intrapartum epidural analgesia. There was a significant increase in the mean duration of analgesia in the pethidine group. However, pethidine did not increase the speed of onset of analgesia, or improve the quality of analgesia.  相似文献   
10.
A survey by questionnaire was carried out to examine the level of nursing staff satisfaction with the acute psychiatric services. Comparisons were made between views of older psychiatric hospitals and newer district general hospital units, and before and after the closure of Friern Barnet Hospital, London, England when the service was reorganized to include fewer beds. The importance of nurses having their say is emphasized, and areas in which improvements can be made are suggested.  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