全文获取类型
收费全文 | 2657653篇 |
免费 | 191777篇 |
国内免费 | 3750篇 |
专业分类
耳鼻咽喉 | 36504篇 |
儿科学 | 86426篇 |
妇产科学 | 71467篇 |
基础医学 | 395535篇 |
口腔科学 | 73486篇 |
临床医学 | 237748篇 |
内科学 | 511824篇 |
皮肤病学 | 59210篇 |
神经病学 | 208437篇 |
特种医学 | 99071篇 |
外国民族医学 | 544篇 |
外科学 | 399886篇 |
综合类 | 53178篇 |
现状与发展 | 12篇 |
一般理论 | 936篇 |
预防医学 | 207694篇 |
眼科学 | 62434篇 |
药学 | 199005篇 |
11篇 | |
中国医学 | 5141篇 |
肿瘤学 | 144631篇 |
出版年
2019年 | 21316篇 |
2018年 | 29586篇 |
2017年 | 22210篇 |
2016年 | 24883篇 |
2015年 | 28031篇 |
2014年 | 39520篇 |
2013年 | 59473篇 |
2012年 | 81826篇 |
2011年 | 87325篇 |
2010年 | 51712篇 |
2009年 | 48980篇 |
2008年 | 82408篇 |
2007年 | 87729篇 |
2006年 | 88720篇 |
2005年 | 85794篇 |
2004年 | 82333篇 |
2003年 | 79229篇 |
2002年 | 76749篇 |
2001年 | 121897篇 |
2000年 | 125212篇 |
1999年 | 105043篇 |
1998年 | 30258篇 |
1997年 | 26487篇 |
1996年 | 27010篇 |
1995年 | 25424篇 |
1994年 | 23470篇 |
1993年 | 22137篇 |
1992年 | 81263篇 |
1991年 | 79473篇 |
1990年 | 77887篇 |
1989年 | 75048篇 |
1988年 | 68974篇 |
1987年 | 67779篇 |
1986年 | 63405篇 |
1985年 | 60876篇 |
1984年 | 45164篇 |
1983年 | 38470篇 |
1982年 | 22726篇 |
1979年 | 41982篇 |
1978年 | 30111篇 |
1977年 | 25034篇 |
1976年 | 23949篇 |
1975年 | 26019篇 |
1974年 | 31212篇 |
1973年 | 29664篇 |
1972年 | 27865篇 |
1971年 | 26606篇 |
1970年 | 24536篇 |
1969年 | 23339篇 |
1968年 | 21546篇 |
排序方式: 共有10000条查询结果,搜索用时 8 毫秒
991.
992.
993.
A W Biglan R Gonnering L B Lockhart B Rabin F H Fuerste 《American journal of ophthalmology》1986,101(2):232-235
To test the possibility of the formation of an antibody to botulinum A toxin after multiple injections of this potent neurotoxin, we collected serum samples from 28 patients who received 57 doses. These injections over a nine-month period with as much as 50 units per injection formed no detectable antibody. 相似文献
994.
AIDS: what is now known. I. History and immunovirology 总被引:1,自引:0,他引:1
P A Selwyn 《Hospital practice (Office ed.)》1986,21(5):67-76, 81-2
995.
996.
997.
998.
Marcel J. Kooy Wouter S. Dessing Esther F. Kroodsma Steven R. J. G. Smits Esther H. Fietje Martine Kruijtbosch Peter A. G. M. De Smet 《Pharmacy World & Science》2007,29(2):81-89
OBJECTIVE: According to a report published by the federation of Dutch patients' associations, patients would like to see a pharmacist, who acts more as a personal adviser. This raised the question, how often Dutch community pharmacists have personal consultations with their patients in daily practice, on which factors this depends, and what kind of topics are discussed during these meetings. SETTING: Community pharmacies in the Netherlands. METHOD: A questionnaire was distributed among 800 randomly selected pharmacies. Questions were restricted to consultations characterized by one-to-one contact, drug therapy related content, and adequate privacy. These consultations were labelled as pharmaceutical consultations in private to distinguish them from other contacts between pharmacists and patients. MAIN OUTCOME MEASURE: Number, content, and character of consultations. RESULTS: 198 (24.8%) community pharmacies responded. The pharmacists provide an average of roughly 1.2 consultations in private per working day. The vast majority of respondents provided face-to-face and telephone consultations (94.4 and 91.9%, respectively), only a minority gave consultations by e-mail (30.8%). These consultations primarily dealt with topics related to medication safety. The mean overall time spent was 290 min per month. A relatively high frequency of personal consultations was significantly associated with the absolute number of full-time equivalent pharmacists in the pharmacy. CONCLUSION: The frequency of pharmaceutical consultations in private is low, but may be improved by reorganisation of the pharmacist's activities. The possibility of personal consultations by e-mail is not yet well-developed. Further research is needed to assess the patient's view of pharmaceutical consultations in private. 相似文献
999.
P M A van Haaren H P Kok C A T van den Berg P J Zum V?rde Sive V?rding S Oldenborg L J A Stalpers M S Schilthuis A A C de Leeuw J Crezee 《International journal of hyperthermia》2007,23(3):303-314
PURPOSE: The aim of this study was to verify hyperthermia treatment planning calculations by means of measurements performed during hyperthermia treatments. The calculated specific absorption rate (SAR(calc)) was compared with clinically measured SAR values, during 11 treatments in seven cervical carcinoma patients. METHODS: Hyperthermia treatments were performed using the 70 MHz AMC-4 waveguide system. Temperatures were measured using multisensor thermocouple probes. One invasive thermometry catheter in the cervical tumour and two non-invasive catheters in the vagina were used. For optimal tissue contact and fixation of the catheters, a gynaecological tampon was inserted, moisturized with distilled water (4 treatments), or saline (6 treatments) for better thermal contact. During one treatment no tampon was used. At the start of treatment the temperature rise (DeltaT(meas)) after a short power pulse was measured, which is proportional to SAR(meas). The SAR(calc) along the catheter tracks was extracted from the calculated SAR distribution and compared with the DeltaT(meas)-profiles. RESULTS: The correlation between DeltaT(meas) and SAR(calc) was on average R = 0.56 +/- 0.28, but appeared highly dependent on the wetness of the tampon (preferably with saline) and the tissue contact of the catheters. Correlations were strong (R approximately 0.85-0.93) when thermal contact was good, but much weaker (R approximately 0.14-0.48) for cases with poor thermal contact. CONCLUSION: Good correlations between measurements and calculations were found when tissue contact of the catheters was good. The main difficulties for accurate verification were of clinical nature, arising from improper use of the gynaecological tampon. Poor thermal contact between thermocouples and tissue caused measurement artefacts that were difficult to correlate with calculations. 相似文献
1000.
D. Besch I. El-Araj J. Mielke V. Herzau 《Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft》2005,102(10):1000-1002
Ohne Zusammenfassung 相似文献