全文获取类型
收费全文 | 14524篇 |
免费 | 1460篇 |
国内免费 | 48篇 |
专业分类
耳鼻咽喉 | 90篇 |
儿科学 | 504篇 |
妇产科学 | 379篇 |
基础医学 | 1818篇 |
口腔科学 | 442篇 |
临床医学 | 1806篇 |
内科学 | 2906篇 |
皮肤病学 | 166篇 |
神经病学 | 1107篇 |
特种医学 | 719篇 |
外科学 | 2074篇 |
综合类 | 400篇 |
一般理论 | 11篇 |
预防医学 | 1815篇 |
眼科学 | 150篇 |
药学 | 857篇 |
中国医学 | 8篇 |
肿瘤学 | 780篇 |
出版年
2023年 | 111篇 |
2021年 | 190篇 |
2020年 | 147篇 |
2019年 | 210篇 |
2018年 | 271篇 |
2017年 | 201篇 |
2016年 | 216篇 |
2015年 | 262篇 |
2014年 | 357篇 |
2013年 | 525篇 |
2012年 | 634篇 |
2011年 | 674篇 |
2010年 | 382篇 |
2009年 | 393篇 |
2008年 | 568篇 |
2007年 | 669篇 |
2006年 | 577篇 |
2005年 | 545篇 |
2004年 | 528篇 |
2003年 | 467篇 |
2002年 | 455篇 |
2001年 | 431篇 |
2000年 | 518篇 |
1999年 | 460篇 |
1998年 | 213篇 |
1997年 | 221篇 |
1996年 | 238篇 |
1995年 | 215篇 |
1994年 | 190篇 |
1993年 | 178篇 |
1992年 | 332篇 |
1991年 | 330篇 |
1990年 | 371篇 |
1989年 | 331篇 |
1988年 | 288篇 |
1987年 | 286篇 |
1986年 | 267篇 |
1985年 | 278篇 |
1984年 | 183篇 |
1983年 | 151篇 |
1982年 | 111篇 |
1981年 | 116篇 |
1979年 | 160篇 |
1978年 | 131篇 |
1977年 | 115篇 |
1976年 | 114篇 |
1974年 | 124篇 |
1973年 | 116篇 |
1972年 | 116篇 |
1971年 | 115篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
22.
Benign intracranial hypertension and recombinant growth hormone therapy in Australia and New Zealand
PA Crock JD McKenzie AM Nicoll NJ Howard W Cutfield LK Shield G Byrne 《Acta paediatrica (Oslo, Norway : 1992)》1998,87(4):381-386
Benign intracranial hypertension (BIH) is reported in three children from Australia and one from New Zealand, who were being treated with recombinant human growth hormone (rhGH). Three males and one female, aged between 10.5 and 14.2 y, developed intracranial hypertension within 2 weeks to 3 months of starting treatment. A national database, OZGROW, has been prospectively collecting data on all 3332 children treated with rhGH in Australia and New Zealand from January 1986 to 1996. The incidence of BIH in children treated with growth hormone (GH) is small, 1.2 per 1000 cases overall, but appears to be greater with biochemical GHD (<10IUml -1 ), i.e. 6.5/1000 (3 in 465 cases), relative risk 18.4, 95% confidence interval 1.9-176.1, than in all other children on the database. The incidence in patients with Turner's syndrome was 2.3/1000 (1 in 428 cases). No cases in patients with partial GHD (10–20 IUml -1 ) or chronic renal failure were identified. Possible causative mechanisms are discussed. The authors'practice is now to start GH replacement at less than the usual recommended dose of 14IUm-2 week-1 in those children considered to be at high risk of developing BIH. Ophthalmological evaluation is recommended for children before and during the first few months following commencement of rhGH therapy and is mandatory in the event of peripheral or facial oedema, persistent headaches, vomiting or visual symptoms. The absence of papilledema does not exclude the diagnosis. 相似文献
23.
INLANDER, CHARLES B., LEVIN, LOWELL B., AND WEINER, E.D. Medicine on Trial: The Appalling Story of Medical Ineptitude and the Arrogance that Overlooks It. 相似文献
24.
The 1966 enactment of Medicare: its effect on discharges from Los Angeles County-operated hospitals. 下载免费PDF全文
The effect of Medicare on two public hospitals in Los Angeles County was analyzed by examining the percentage of patients 65 years of age and older among all discharges from 1958 through 1971. At Harbor General Hospital, discharges of elderly patients had dropped from 21.7% to 7.9% by late 1966; at Los Angeles County General Hospital, discharges decreased from 15.3% to 10.7% between 1966 and 1967. Monitoring public hospitals' demographic changes after enacting a national health plan may provide information on patients' and providers' acceptance of insurance and on resources needed by public hospitals to care for those left without coverage. 相似文献
25.
26.
Milton J. Guiberteau MD Pamela A. Wilcox RN MBA Sandra Bjork RN JD 《Journal of the American College of Radiology》2004,1(2):92-97
Clinical practice guidelines have emerged as a reality for medical practitioners over the past 20 years. Although virtually all groups interested in the development of practice guidelines hope for improvements in patient care, secondary expectations vary widely among those using them. Their use in daily practice by physicians has met with resistance from barriers including concerns of “cookbook” medicine, a loss of autonomy, and increased professional liability. The recent experience of the ACR in addressing these challenges illustrates that physicians are receptive to steps perceived to mitigate the risks accompanying the use of guidelines as well as to efforts to increase their understanding of implementing guidelines in clinical practice. The experiences of other medical societies and an inventory of future trends reveal additional challenges associated with the use of practice guidelines, as third parties look to guidelines as points of reference for gauging the performance of health care providers. 相似文献
27.
目的由于卒中风险随着狭窄严重程度的增加而升高,因此认为颈内动脉(ICA)接近闭塞患者的卒中风险很高。在现有的随机试验中,还没有专门针对这种情况进行探讨,因此其处理尚存在争汶。方法:对相关文献进行系统评价。结果:对ICA接近闭塞患者的处理还存在争议:一些学者支持进行干预,而另一些学者则认为存在风险或没有益处而反对进行干预。在ICA接近闭塞的有症状患者中进行一项比较外科治疗与最佳内科治疗的多中心前瞻性随机试验似乎非常困难,因为这类研究需要大量的患者。尽管如此,基于目前的证据,似乎很难拒绝手术治疗。结论:由于目前对ICA接近闭塞患者的最佳处理方案仍存在着争议,因此需要前瞻性观察性研究以证实其在有症状和无症状人群中的患病率以及相关的卒中风险。基于目前的证据,大多数医疗中心选择手术治疗,但它相对干内科治疗的特粱尚右待证章. 相似文献
28.
29.
L D Stegink L J Filer G L Baker E F Bell 《The American journal of clinical nutrition》1986,43(4):510-515
Plasma glutamate concentrations in human subjects are markedly lower when monosodium L-glutamate (MSG) is ingested in consomme with starch than when ingested in consomme alone. This study investigated whether sucrose had a similar effect. Six normal adult subjects (three male, three female) ingested two servings of beef consomme each providing 50 mg MSG/kg body weight in a randomized crossover design. One serving of consomme contained no added carbohydrate; the other provided 0.5 g sucrose/kg body weight. Ingestion of the consomme without sucrose significantly (p less than 0.05) increased the mean plasma glutamate concentration from baseline (4.44 +/- 0.97 mumol/dl) to a peak value of 18.1 +/- 6.99 mumol/dl 30 min after dosing. The area under the plasma glutamate concentration-time curve was 553 +/- 238 mumol/dl X min. When the consomme contained 0.5 g sucrose/kg body weight, both the mean peak plasma glutamate concentration (5.48 +/- 2.19 mumol/dl) and the area under the curve (105 +/- 46 mumol/dl X min) were significantly lower. These data confirm that metabolizable carbohydrate has a significant effect on plasma glutamate concentration response after MSG loading. 相似文献
30.