全文获取类型
收费全文 | 4528篇 |
免费 | 468篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 37篇 |
儿科学 | 278篇 |
妇产科学 | 87篇 |
基础医学 | 577篇 |
口腔科学 | 185篇 |
临床医学 | 441篇 |
内科学 | 1062篇 |
皮肤病学 | 51篇 |
神经病学 | 401篇 |
特种医学 | 495篇 |
外科学 | 403篇 |
综合类 | 129篇 |
一般理论 | 4篇 |
预防医学 | 321篇 |
眼科学 | 37篇 |
药学 | 305篇 |
1篇 | |
中国医学 | 6篇 |
肿瘤学 | 181篇 |
出版年
2021年 | 44篇 |
2019年 | 42篇 |
2018年 | 56篇 |
2017年 | 49篇 |
2016年 | 39篇 |
2015年 | 60篇 |
2014年 | 72篇 |
2013年 | 117篇 |
2012年 | 129篇 |
2011年 | 139篇 |
2010年 | 100篇 |
2009年 | 109篇 |
2008年 | 148篇 |
2007年 | 145篇 |
2006年 | 148篇 |
2005年 | 140篇 |
2004年 | 134篇 |
2003年 | 135篇 |
2002年 | 121篇 |
2001年 | 132篇 |
2000年 | 95篇 |
1999年 | 115篇 |
1998年 | 112篇 |
1997年 | 122篇 |
1996年 | 107篇 |
1995年 | 99篇 |
1994年 | 61篇 |
1993年 | 86篇 |
1992年 | 79篇 |
1991年 | 103篇 |
1990年 | 97篇 |
1989年 | 131篇 |
1988年 | 121篇 |
1987年 | 142篇 |
1986年 | 128篇 |
1985年 | 143篇 |
1984年 | 91篇 |
1983年 | 82篇 |
1982年 | 70篇 |
1981年 | 57篇 |
1980年 | 77篇 |
1979年 | 76篇 |
1978年 | 76篇 |
1977年 | 73篇 |
1976年 | 56篇 |
1975年 | 59篇 |
1974年 | 46篇 |
1973年 | 40篇 |
1970年 | 38篇 |
1969年 | 40篇 |
排序方式: 共有5001条查询结果,搜索用时 406 毫秒
1.
Isolated patellofemoral arthritis is an increasingly recognized entity, and is usually associated with previous patellofemoral dysplasia or instability. Patellofemoral arthroplasty (PFA) has evolved significantly in recent years, both in terms of implant design and importantly in the understanding of appropriate patient selection. This review outlines the indications and investigations for PFA, provides a brief history of the development of contemporary implants, and presents the clinical outcomes for the prostheses most commonly used in the UK. In addition, it provides a detailed surgical technique for implantation of an onlay implant, with tips on how to optimize patellofemoral biomechanics and thus achieve a consistently good outcome. 相似文献
2.
C. Edwin Polk DDS MSD David Buchanan PhD 《American journal of orthodontics and dentofacial orthopedics》2003,124(6):663-669
The cephalometric measurement known as Wits appraisal (AOBO) was studied to determine its importance in diagnosis, treatment, and prediction of treatment success. The Wits appraisal is used primarily to identify unreliable ANB values (those that do not accurately reflect the degree of horizontal jaw discrepancy, ie, those that differ greatly from the AOBO value). Therefore, differences between AOBO and ANB also were evaluated. Because neither measurement alone can assess jaw discrepancies with total accuracy, they were combined, plotted on a scattergram, and divided into equal zones to create a new index of horizontal skeletal discrepancies and treatment predictability. Pretreatment values correspond to treatment difficulty, and posttreatment values correspond to the effectiveness of treatment. Treatment time for each zone also was evaluated. We were able to draw several conclusions from this study. First, combining AOBO and ANB values results in a more accurate measurement of treatment difficulty. These combined values also can be used to predict both treatment time and the success of treatment for horizontal discrepancies. Second, the AOBO value predicts variations in treatment time at each ANB value. Finally, adding ANB and AOBO values and then dividing the total yields zones that represent statistically significant differences in treatment times and percentages of success. The zones also correlate with the difference between AOBO and ANB measurements. 相似文献
3.
P Tugwell L Hart G Kraag A Park C Dok F Bianchi C Goldsmith W W Buchanan 《The Journal of rheumatology》1984,11(4):457-461
A crossover double-blind controlled trial was performed on 36 patients with rheumatoid arthritis to assess the necessity for serum salicylate monitoring in determining optimal dosage. There was no clinically or statistically significant increase in the clinical improvement of patients associated with serum monitoring but potentially toxic serum levels occurred without tinnitus when serum monitoring was not used. 相似文献
4.
5.
Two sets of factors will ultimately influence the outcome of the burned upper extremity. The first set of factors is the depth and severity of the burn. The second set is the group of complications of the burn injury attributable to edema, inflammation, immobility, and malposition. An awareness of the potential pitfalls that follow burn injury has resulted in improved primary care and a lessening of deformity. Progressive acute care with topical chemotherapy, early motion, thoughtful splinting, and timely burn wound closure are essential to reduce the need for secondary operations. Reconstructive efforts should be tailored to the individual needs of the patient. These procedures should be carefully planned with a view toward balancing aesthetic and functional considerations and minimizing the time required for rehabilitation. 相似文献
6.
RA O. Hempel 《Notfall & Rettungsmedizin》2007,10(5):367-371
Legal uncertainties for emergency vehicle drivers can be avoided when fundamental rules are established. In particular, differentiation of special rights and rights of way is essential. Inherent in both is the urgency necessary to save human lives. The right of way signaled by flashing blue lights and siren does not however justify traffic violations but signifies rather a request to other traffic participants. In contrast, special rights require no announcement and constitute a justifiable reason for traffic violations. Even so they do not allow that other traffic participants be endangered or harmed. Adherence to these basic principles can prevent legal misinterpretations as well as rigid adoption of inflexible standards of behavior. 相似文献
7.
RA Mag. Dr. C. Gepart 《Notfall & Rettungsmedizin》2007,10(4):289-292
Austria’s new Living Wills Act (Patientenverfügungsgesetz, or PatVG) that came into effect on 1st of June 2006, is the first law in Austria to regulate the controversial issue of living wills. The PatVG provides for a right to refuse future medical treatment by making an advance directive in the form of a living will that is either binding or “to be taken into consideration”. However, the establishment of a binding living will is governed by strict criteria as regards form and content, and both a medical doctor and a legal expert must be involved. Compliance with a living will is not allowed where there is a legal obligation to give medical treatment. There is also a legal obligation to give medical treatment in emergency situations where the time involved in looking for a living will could seriously endanger the health or the life of a patient. 相似文献
8.
Ohne Zusammenfassung 相似文献
9.
Both cyproterone acetate (CPA) and the gonadotrophin-releasing hormone
agonist (GnRHa) have been shown to be effective for the treatment of
hirsutism. We wished to compare the effectiveness of CPA in two standard
doses with GnRHa and add-back therapy and to compare the length of
remission after these treatments. A total of 60 hirsute hyperandrogenic
women was assigned to the following treatment groups: CPA 2 mg with 35
microg of ethinylestradiol for 21 days each month (Diane group), CPA 50 mg,
days 5-15, and ethinylestradiol 50 microg, days 5-25, each month (CPA
group) or Decapeptyl 3.75 mg i.m. every 28 days with the addition of
conjugated oestrogen 0.625 mg, days 1-21, and medroxyprogesterone acetate
10 mg, days 12-21 (GnRHa group). Hirsutism was graded by the
Ferriman-Gallwey-Lorenzo (FGL) index and anagen hair shaft diameters and
serum luteinizing hormone (LH) and testosterone were assessed before and
every 3 months during and after treatment. All women were treated for 1
year with 1 year follow-up. At baseline hirsutism and endocrine patterns
were similar in all groups. After one year of treatment, hirsutism
decreased in all groups but the changes were greater (P <0.05) in the
CPA and GnRHa groups than in the Diane group. Serum LH and testosterone
were lowest in the GnRHa group. After withdrawal, hirsutism increased
rapidly in the Diane and CPA groups and after 6 months, FGL scores and hair
shaft diameters were similar to pretreatment values. In the GnRHa group,
hirsutism increased more gradually and after 1 year of withdrawal, FGL
scores and hair diameters were significantly (P <0.05) less than
pretreatment values. Serum LH and testosterone increased rapidly in all
three groups reaching pretreatment values by 6 months. These data suggest
equal efficacy of the GnRHa and the high dose CPA regimen for the treatment
of hirsutism in hyperandrogenic women. GnRHa with add-back treatment
appears to result in a longer remission of hirsutism in comparison with
CPA.
相似文献
10.