全文获取类型
收费全文 | 6691篇 |
免费 | 451篇 |
国内免费 | 19篇 |
专业分类
耳鼻咽喉 | 70篇 |
儿科学 | 266篇 |
妇产科学 | 106篇 |
基础医学 | 759篇 |
口腔科学 | 160篇 |
临床医学 | 1351篇 |
内科学 | 1104篇 |
皮肤病学 | 55篇 |
神经病学 | 683篇 |
特种医学 | 69篇 |
外科学 | 527篇 |
综合类 | 96篇 |
一般理论 | 6篇 |
预防医学 | 919篇 |
眼科学 | 100篇 |
药学 | 432篇 |
1篇 | |
中国医学 | 5篇 |
肿瘤学 | 452篇 |
出版年
2023年 | 66篇 |
2022年 | 55篇 |
2021年 | 142篇 |
2020年 | 105篇 |
2019年 | 147篇 |
2018年 | 173篇 |
2017年 | 110篇 |
2016年 | 127篇 |
2015年 | 156篇 |
2014年 | 247篇 |
2013年 | 382篇 |
2012年 | 521篇 |
2011年 | 547篇 |
2010年 | 289篇 |
2009年 | 272篇 |
2008年 | 414篇 |
2007年 | 498篇 |
2006年 | 441篇 |
2005年 | 470篇 |
2004年 | 407篇 |
2003年 | 367篇 |
2002年 | 369篇 |
2001年 | 36篇 |
2000年 | 38篇 |
1999年 | 50篇 |
1998年 | 73篇 |
1997年 | 53篇 |
1996年 | 33篇 |
1995年 | 53篇 |
1994年 | 37篇 |
1993年 | 41篇 |
1992年 | 32篇 |
1991年 | 21篇 |
1990年 | 30篇 |
1989年 | 17篇 |
1988年 | 20篇 |
1987年 | 22篇 |
1986年 | 16篇 |
1985年 | 25篇 |
1984年 | 24篇 |
1983年 | 27篇 |
1982年 | 38篇 |
1981年 | 29篇 |
1980年 | 22篇 |
1979年 | 16篇 |
1978年 | 13篇 |
1977年 | 12篇 |
1975年 | 11篇 |
1974年 | 8篇 |
1973年 | 7篇 |
排序方式: 共有7161条查询结果,搜索用时 0 毫秒
1.
2.
Brenda Laky Isabella Alram Julia K. Frank Leo Pauzenberger Werner Anderl Karl-Heinz Wagner Philipp R. Heuberer 《Journal of orthopaedic research》2020,38(9):2074-2082
Increasing numbers of arthroplasties are also accompanied by postoperative infections. The main purpose was to evaluate preoperative serum bilirubin levels between patients with and without infections after shoulder and knee arthroplasties. For this retrospective case-control single-center study, a total of 108 patients were extracted from a prospectively collected database. Eighteen patients with infections after shoulder (n = 8) and knee (n = 10) arthroplasty were matched by age, gender, and implant type in a 1:5-scenario to 90 patients (40 shoulders and 50 knees) without postoperative infection. Demographic data, preoperative blood parameters, and postoperative infection-related outcomes were evaluated. Total bilirubin was the only preoperative parameter significantly different between the infection (8.21 ± 3.25 μmol/L or 0.48 ± 0.19 mg/dL) and noninfection (10.78 ± 4.62 μmol/L or 0.63 ± 0.27 mg/dL; P = .014) group, while C-reactive protein and other liver parameters were similar between the groups. Significantly more controls (92.1%) had preoperative bilirubin levels above 8.72 μmol/L or 0.51 mg/dL than cases (7.9%; P = .007). The 5-year infection survival-rate was 65.6% for patients with preoperative bilirubin levels < 8.72 μmol/L or < 0.51 mg/dL and 91.2% with ≥ 8.72 μmol/L or ≥ 0.51 mg/dL. Mildly decreased preoperative bilirubin levels with a cutoff at 8.72 μmol/L or 0.51 mg/dL were significantly associated to patients with infections after shoulder and knee arthroplasty. There were no differences in other blood parameters or comorbidities between patients with infections and their matched-controls. 相似文献
3.
James I. Geller MD Joseph G. Pressey MD Malcolm A. Smith MD Rachel A. Kudgus PhD Mariana Cajaiba MD Joel M. Reid PhD David Hall PhD Donald A. Barkauskas PhD Stephen D. Voss MD Steve Y. Cho MD Stacey L. Berg MD Jeffrey S. Dome MD PhD Elizabeth Fox MD Brenda J. Weigel MD 《Cancer》2020,126(24):5303-5310
4.
5.
6.
Claire-Jehanne Dubouloz Diane Laporte Martha Hall Brenda Ashe C Douglas Smith 《The American journal of occupational therapy》2004,58(4):398-407
The purpose of this qualitative study was to examine the process of transformation of personal beliefs, values, feelings, and knowledge (meaning perspectives) underlying occupational change in a small group of clients with rheumatoid arthritis during home-based rehabilitation. A grounded theory approach used to collect and analyze data concurrently included: (1) a sample of five adult clients diagnosed with rheumatoid arthritis in occupational therapy, (2) data collection through 28 semi-directed interviews, and (3) data analysis using the constant comparison method. The study identified meaning perspectives of these clients with rheumatoid arthritis and explored the transformation of perspectives related to the modification of occupational performance. The study suggests that the exploration of meaning perspective transformation by clients and therapists could be a potential part of rehabilitation intervention. 相似文献
7.
Brenda D. Jamerson Pharm.D. George E. Dukes Pharm.D. Kim L.R. Brouwer Pharm.D. Ph.D. Karl H. Dorm Ph.D. John A. Messenheimer M.D. J. Robert Powell Pharm.D. 《Pharmacotherapy》1994,14(1):47-52
Study Objective . To compare the frequency, severity, and time course of venous irritation after administration of a single intravenous dose of phenytoin with an equimolar dose of fosphenytoin, a water-soluble phenytoin prodrug. Design . Randomized, double-blind, two-period, crossover study. Setting . University hospital clinical research unit. Patients . Twelve healthy volunteers within 15% of ideal body weight and with no clinically significant abnormalities on physical examination, medical history, or laboratory assessment. Interventions . Volunteers randomly received a 30-minute infusion of phenytoin sodium 250 mg (250 mg/5 ml) or an equimolar dose of fosphenytoin 375 mg (375 mg/5 ml). Subjects returned for the crossover treatment 14–21 days later. Measurements and Main Results . Subjects assessed venous irritation (pain, burning, itching), and investigators evaluated phlebitis (erythema, swelling, tenderness), induration, exudation, and cording. Phenytoin was associated with a significantly higher degree of pain at the infusion site in all subjects and a significant degree of phlebitis in eight subjects (p<0.05); cording occurred in six subjects. The time course of phenytoin-induced phlebitis was bimodal. Erythema and tenderness were prominent at the end of the infusion and again at 24 hours. Cording was first noted between 24 hours and 1 week after infusion. In contrast, fosphenytoin was associated with mild pain in two subjects, one incident of phlebitis, and no erythema or cording. Conclusions . Fosphenytoin administration resulted in significantly less venous irritation and phlebitis compared with an equimolar dose of phenytoin. The clinical use of this water-soluble phenytoin prodrug should minimize the frequency and severity of infusion-site reactions and should allow convenient, rapid, intravenous administration of drug, undiluted or admixed with intravenous solutions. 相似文献
8.
Brenda M Sandmaier Storb Rainer Yanfang Liu Erlinda B Santos Eileen Bryant Friedrich G Schuening H Joachim Deeg Kristy Seidel Theodore Graham 《Transplant immunology》1996,4(4):271-274
920 cGy total body irradiation (TBI) is adequate for consistently successful engraftment of marrow from dog leukocyte antigen (DLA)-identical littermates; however, the dose is inadequate to ensure a marrow graft from DLA-nonidentical unrelated donors. Such mismatched grafts are successful only after 1800 cGy, given in three fractions. While anti-T-cell reagents enhance engraftment of DLA-identical littermate marrow after 920 cGy, they fail to be effective in the DLA-nonidentical setting. However, a monoclonal antibody (mAb) to CD44, S5, was found to be very effective in enhancing engraftment of DLA-nonidentical marrow. The current study asked whether mAb S5 was also effective in the setting of DLA-identical littermate transplants. To this purpose, the TBI dose was lowered to 450 cGy, a dose after which 70% of such grafts failed. Four dogs were treated with antibody S5, 0.2 mg/kg on days −7 though −2 (per previously published protocol), given 450 cGy TBI followed by marrow grafts from their DLA-identical littermates. All four dogs rejected their grafts; two of these died from marrow aplasia, and two survived with endogenous marrow recovery. This result was not statistically significantly different from that in 17, historical (n = 5) and concurrent (n = 12), control dogs where 11 of 17 animals rejected. Even if ten experimental animals were transplanted and all six remaining dogs engrafted, the results still would not have been significantly different from control. This result is in contrast to the successful engraftment promoted by pretreatment with antibody S5 of DLA-nonidentical unrelated dogs, consistent with the notion that different host cells are involved in graft rejection in the two disparate histocompatibility settings. 相似文献
9.
10.
CHEP Recommendations: Applying the 2005 Canadian Hypertension Education Program recommendations: 2. Assessing and reducing global atherosclerotic risk among hypertensive patients 下载免费PDF全文