全文获取类型
收费全文 | 8055篇 |
免费 | 791篇 |
国内免费 | 179篇 |
专业分类
耳鼻咽喉 | 87篇 |
儿科学 | 284篇 |
妇产科学 | 182篇 |
基础医学 | 476篇 |
口腔科学 | 323篇 |
临床医学 | 1453篇 |
内科学 | 1678篇 |
皮肤病学 | 172篇 |
神经病学 | 582篇 |
特种医学 | 242篇 |
外科学 | 1829篇 |
综合类 | 18篇 |
一般理论 | 1篇 |
预防医学 | 744篇 |
眼科学 | 395篇 |
药学 | 239篇 |
中国医学 | 44篇 |
肿瘤学 | 276篇 |
出版年
2023年 | 124篇 |
2022年 | 89篇 |
2021年 | 149篇 |
2020年 | 169篇 |
2019年 | 130篇 |
2018年 | 194篇 |
2017年 | 244篇 |
2016年 | 259篇 |
2015年 | 248篇 |
2014年 | 353篇 |
2013年 | 430篇 |
2012年 | 307篇 |
2011年 | 372篇 |
2010年 | 368篇 |
2009年 | 431篇 |
2008年 | 297篇 |
2007年 | 265篇 |
2006年 | 263篇 |
2005年 | 199篇 |
2004年 | 136篇 |
2003年 | 122篇 |
2002年 | 119篇 |
2001年 | 150篇 |
2000年 | 110篇 |
1999年 | 151篇 |
1998年 | 187篇 |
1997年 | 208篇 |
1996年 | 309篇 |
1995年 | 261篇 |
1994年 | 200篇 |
1993年 | 120篇 |
1992年 | 137篇 |
1991年 | 148篇 |
1990年 | 77篇 |
1989年 | 138篇 |
1988年 | 108篇 |
1987年 | 87篇 |
1986年 | 111篇 |
1985年 | 89篇 |
1984年 | 91篇 |
1983年 | 79篇 |
1982年 | 68篇 |
1981年 | 65篇 |
1980年 | 81篇 |
1978年 | 62篇 |
1977年 | 43篇 |
1976年 | 43篇 |
1975年 | 46篇 |
1964年 | 49篇 |
1963年 | 47篇 |
排序方式: 共有9025条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
John Lennon Silva Cunha Amanda Almeida Leite Thamiris de Castro Abrantes Lorena Passoni Vervloet Thayn Melo de Lima Morais Gerson de Oliveira Paiva Neto Tatiana Nayara Librio Kimura Snia Maria Soares Ferreira Ricardo Luiz Cavalcanti de Albuquerque‐Júnior Aline Corrêa Abraho Mario Jos Romaach Bruno Augusto Benevenuto de Andrade Oslei Paes de Almeida Ciro Dantas Soares 《Journal of cutaneous pathology》2021,48(1):24-33
5.
Prevalence of vitamin D depletion among morbidly obese patients seeking gastric bypass surgery 总被引:5,自引:0,他引:5
Arthur M. Carlin M.D. D. Sudhaker Rao MB B.S. F.A.C.P. F.A.C.E. Ali M. Meslemani M.D. Jeffrey A. Genaw M.D. Nayana J. Parikh Shiri Levy M.D. Arti Bhan M.D. Gary B. Talpos M.D. 《Surgery for obesity and related diseases》2006,2(2):696-103
BACKGROUND: Abnormalities in calcium and vitamin D metabolism have been reported after bariatric surgery. The purpose of this study was to evaluate vitamin D nutritional status among morbidly obese patients before gastric bypass surgery. METHODS: We prospectively studied 279 morbidly obese patients seeking gastric bypass surgery for vitamin D nutritional status as assessed by serum 25-hydroxyvitamin D level. In addition, serum samples were analyzed for calcium, alkaline phosphatase (AP), intact parathyroid hormone (PTH), and 1,25-dihydroxyvitamin D. RESULTS: Mean patient age was 43 +/- 9 years; 87% of the study patients were women, and 72% were white. Serum calcium and AP levels were normal in 88% and 89% of the patients, respectively. Vitamin D depletion, defined as serum 25-hydroxyvitamin D level 相似文献
6.
7.
To study the effect of sorbinil on the alteration of the blood-retinal barrier, 32 adult-onset, non-insulin-dependent diabetic patients with minimal or no retinopathy were randomly assigned to receive either oral sorbinil (250 mg once a day) or a placebo for 6 mo. All patients underwent fundus photography, fluorescein angiography, and vitreous fluorophotometry before treatment and at 3 and 6 mo after treatment. Vitreous fluorophotometry data showed that the alteration of the blood-retinal barrier increased significantly less in the sorbinil-treated group compared with the placebo group during the 6-mo study period. Side effects were limited to hypersensitivity reactions, with skin rash and fever, in only 2 of the 16 patients who received the drug. These hypersensitivity reactions disappeared with discontinuation of the medication. Aldose-reductase inhibition may play an important role in stabilization of the blood-retinal barrier in early diabetic retinopathy. 相似文献
8.
9.
LESLEY BOULTON MB CHB FRACO DO Ophthalmologist 《Clinical & experimental ophthalmology》1986,14(4):365-371
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
10.
Comparison of trichloroethylene and enflurane as adjuncts to nitrous oxide and relaxant anaesthesia 总被引:1,自引:0,他引:1
Forty women who underwent gynaecological surgery were randomly allocated to receive trichloroethylene, enflurane, or enflurane plus fentanyl as adjuncts to nitrous oxide/relaxant anaesthesia with controlled ventilation. No serious cardiac dysrhythmias were seen in any group. Each patient was observed postoperatively for 4 hours by a nurse blind to the technique used, and questioned at 24 hours by a similarly blinded anaesthetist. Recovery after trichloroethylene was not significantly prolonged although postoperative analgesia by visual analogue was better, opiate analgesia was required less frequently and there was less nausea and vomiting than in either of the enflurane groups. We argue for the continued use of trichloroethylene by this technique, because it costs one hundred times less than enflurane and because of the potential morbidity of the postoperative opiate dosage required after enflurane. 相似文献