全文获取类型
收费全文 | 297826篇 |
免费 | 40128篇 |
国内免费 | 3050篇 |
专业分类
耳鼻咽喉 | 6365篇 |
儿科学 | 9067篇 |
妇产科学 | 5074篇 |
基础医学 | 23413篇 |
口腔科学 | 4866篇 |
临床医学 | 40562篇 |
内科学 | 78311篇 |
皮肤病学 | 10172篇 |
神经病学 | 28863篇 |
特种医学 | 12212篇 |
外国民族医学 | 6篇 |
外科学 | 62477篇 |
综合类 | 2116篇 |
现状与发展 | 74篇 |
一般理论 | 139篇 |
预防医学 | 17791篇 |
眼科学 | 6419篇 |
药学 | 11309篇 |
2篇 | |
中国医学 | 251篇 |
肿瘤学 | 21515篇 |
出版年
2024年 | 761篇 |
2023年 | 5427篇 |
2022年 | 2353篇 |
2021年 | 5743篇 |
2020年 | 7772篇 |
2019年 | 4863篇 |
2018年 | 10502篇 |
2017年 | 9702篇 |
2016年 | 11143篇 |
2015年 | 11586篇 |
2014年 | 19992篇 |
2013年 | 21856篇 |
2012年 | 15658篇 |
2011年 | 16284篇 |
2010年 | 16311篇 |
2009年 | 19739篇 |
2008年 | 15677篇 |
2007年 | 14648篇 |
2006年 | 16548篇 |
2005年 | 14143篇 |
2004年 | 12836篇 |
2003年 | 11343篇 |
2002年 | 10878篇 |
2001年 | 5156篇 |
2000年 | 4053篇 |
1999年 | 4692篇 |
1998年 | 5640篇 |
1997年 | 4983篇 |
1996年 | 4673篇 |
1995年 | 4380篇 |
1994年 | 3018篇 |
1993年 | 2619篇 |
1992年 | 2107篇 |
1991年 | 2153篇 |
1990年 | 1637篇 |
1989年 | 1746篇 |
1988年 | 1555篇 |
1987年 | 1396篇 |
1986年 | 1361篇 |
1985年 | 1231篇 |
1984年 | 1166篇 |
1983年 | 1071篇 |
1982年 | 1252篇 |
1981年 | 1094篇 |
1980年 | 948篇 |
1979年 | 667篇 |
1978年 | 692篇 |
1977年 | 794篇 |
1976年 | 567篇 |
1975年 | 564篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
101.
This was a retrospective observational study of 11 consecutive patients of major primary postpartum haemorrhage (PPH) who had the B-Lynch suture at the time of caesarean section, performed between 1 March 2001 and 31 March 2004 at a teaching hospital in Scotland. Case-note review was performed in 123 patients, who had major primary PPH to identify patients who had B-Lynch sutures at the time of caesarean section. The patient's age, parity, gestation of pregnancy at which the B-Lynch suture was performed, the indication for caesarean section and the cause of primary major PPH were recorded. The operative details, intraoperative and immediate postoperative complications and the need for subsequent hysterectomy were noted. The patients were followed-up with clinic visits at 6 weeks and any further hospital referral for late postoperative complications and whether subsequent successful pregnancy was achieved, were documented. The incidence of major PPH in our centre was 0.5% of the total deliveries, of which 11 cases had the B-Lynch suture applied at the time of caesarean section. The patients were aged between 25 and 38 years old (mean 31 years). Parity ranged from 0 to 1 and the gestational age at which the procedure was performed ranged from 34 to 41 weeks (mean 38 weeks). Ten operations (91%) were performed by senior registrars supervised by the consultant on call and one (9%) case was performed by a consultant on call. All cases had the B-Lynch sutures performed for major primary PPH caused by uterine atony at the time of caesarean section. The weight of the babies delivered ranged between 2,110 - 4,820 g (mean 3,500 g). The total blood loss at surgery ranged from 2,000 - 10,000 ml (mean 3,500 ml). Only three patients (28%) required hysterectomy. All the patients made a good postoperative recovery. The hospital stay ranged from 4 - 24 days (mean 8 days). The patient who remained in hospital for 24 days did so because her baby was admitted into the neonatal unit. All the patients were reviewed 6 weeks postnatally. There was no significant morbidity. A subsequent successful pregnancy has been achieved in one patient. 相似文献
102.
103.
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
104.
Improvement in the Appearance of Wrinkles with Topical Transforming Growth Factor β1 and l-Ascorbic Acid 总被引:1,自引:0,他引:1
MICHELLE EHRLICH MD JAGGI RAO MD ANJU PABBY MD MITCHEL P. GOLDMAN MD 《Dermatologic surgery》2006,32(5):618-625
BACKGROUND AND OBJECTIVE: Facial rhytides are a common cosmetic concern. Surgical treatment effects dramatic improvement; however, the associated risk and cost may be prohibitive. Recent focus is on developing topical products containing biologically active ingredients for at-home therapy. Our study examines the effects of a topical cream containing transforming growth factor-beta(1) (TGF-beta(1)), l-ascorbic acid, and Cimicifuga racemosa extract (CRS) (Topix Pharmaceuticals, North Amityville, NY, USA). MATERIALS AND METHODS: In the first arm of the study, 12 subjects were randomized to apply CRS to the left or right side of their face and a cream containing l-ascorbic acid and C. racemosa in silicone base (vitamin C [Vit C]) to the contralateral side twice daily for 3 months. In the second arm of the study, 20 subjects were randomized to apply CRS to the left or right side of their face and Tissue Nutrient Solution Recovery Complex (TNS) (SkinMedica, Carlsbad, CA, USA), a product containing a variety of growth factors including VEGF, PDGF-A, G-CSF, HGF, IL-6, IL-8, and TGF-beta(1) (Nouricel-MD) without l-ascorbic acid, C. racemosa extract, or silicone base, to the contralateral side of their face twice daily for 3 months. Digital photographs were scored by study-blinded physicians, and self-assessments were completed by all subjects at baseline and at the conclusion of the protocol. RESULTS: CRS and TNS were well tolerated, and all subjects completed the 3-month protocol for the CRS versus Vit C arm of the study. Physicians rated success in facial wrinkling scores on the CRS-treated side of the face for 27 of 31 subjects. Responders showed, on average, 21.7% improvement in physician-rated wrinkle scores. The mean improvement in the group of 31 patients as a whole was 12%. Eighteen of 31 subjects reported a noticeable improvement on their CRS-treated side. Both CRS and TNS demonstrate significant success between baseline and 3-month scores, and both growth factor products are superior to Vit C. Patients preferred CRS over TNS. CONCLUSION: CRS is effective in minimizing the appearance of facial rhytides. The success of the CRS product is largely attributable to the incorporation of TGF-beta(1). 相似文献
105.
Williamson Kathleen A.; Hever Ann M.; Rainger Joe; Rogers R. Curtis; Magee Alex; Fiedler Zdenek; Keng Wee Teik; Sharkey Freddie H.; McGill Niolette; Hill Clare J.; Schneider Adele; Messina Mario; Turnpenny Peter D.; Fantes Judy A.; van Heyningen Veronica; FitzPatrick David R. 《Human molecular genetics》2006,15(12):2030
Table 1 相似文献
106.
107.
108.
109.
110.