全文获取类型
收费全文 | 1083篇 |
免费 | 39篇 |
国内免费 | 65篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 58篇 |
妇产科学 | 15篇 |
基础医学 | 104篇 |
口腔科学 | 39篇 |
临床医学 | 157篇 |
内科学 | 268篇 |
皮肤病学 | 24篇 |
神经病学 | 12篇 |
特种医学 | 246篇 |
外科学 | 52篇 |
综合类 | 30篇 |
一般理论 | 1篇 |
预防医学 | 36篇 |
眼科学 | 14篇 |
药学 | 69篇 |
中国医学 | 1篇 |
肿瘤学 | 59篇 |
出版年
2022年 | 4篇 |
2021年 | 6篇 |
2020年 | 4篇 |
2019年 | 3篇 |
2018年 | 5篇 |
2017年 | 5篇 |
2016年 | 8篇 |
2015年 | 16篇 |
2014年 | 18篇 |
2013年 | 27篇 |
2012年 | 16篇 |
2011年 | 21篇 |
2010年 | 31篇 |
2009年 | 46篇 |
2008年 | 23篇 |
2007年 | 66篇 |
2006年 | 40篇 |
2005年 | 30篇 |
2004年 | 26篇 |
2003年 | 18篇 |
2002年 | 18篇 |
2001年 | 17篇 |
2000年 | 15篇 |
1999年 | 19篇 |
1998年 | 63篇 |
1997年 | 74篇 |
1996年 | 71篇 |
1995年 | 61篇 |
1994年 | 42篇 |
1993年 | 54篇 |
1992年 | 10篇 |
1991年 | 21篇 |
1990年 | 16篇 |
1989年 | 42篇 |
1988年 | 23篇 |
1987年 | 38篇 |
1986年 | 14篇 |
1985年 | 25篇 |
1984年 | 17篇 |
1983年 | 24篇 |
1982年 | 21篇 |
1981年 | 17篇 |
1980年 | 22篇 |
1979年 | 6篇 |
1978年 | 7篇 |
1977年 | 9篇 |
1976年 | 5篇 |
1975年 | 7篇 |
1974年 | 5篇 |
1966年 | 2篇 |
排序方式: 共有1187条查询结果,搜索用时 14 毫秒
61.
62.
E Westley H von Hertzen A Faundes 《International journal of gynaecology and obstetrics》2007,97(3):235-237
Emergency contraception (EC) is safe and has the potential to prevent unwanted pregnancies. However, use remains low in most settings, due to a range of barriers to access. This paper reviews key issues related to EC and describes recommendations reached during the Women's Health Alliance pre-Congress workshop, held in advance of the FIGO 2006 World Congress. The working group concluded that national societies of obstetrics and gynecology can play an important role in increasing access to this unique contraceptive method. 相似文献
63.
Pneumocystis carinii pneumonia studied by gallium-67 scanning 总被引:1,自引:0,他引:1
The validity and reliability of gallium-67 (Ga-67) scanning for diagnosis and follow-up of Pneumocystis carinii pneumonia (PCP) were assessed in 34 patients thought to have pulmonary complications of acquired immunodeficiency syndrome (AIDS). Overall sensitivity was 94% and specificity 74%. Among patients with normal or equivocal chest radiographs at the time of admission, sensitivity was 86% and specificity 85%. The authors consider Ga-67 scanning a valid and reliable adjunct in the diagnosis of PCP in AIDS patients with respiratory symptoms when the chest radiograph is normal or equivocal. 相似文献
64.
葛根素对高血压患者血浆内皮素和一氧化氮的影响 总被引:29,自引:0,他引:29
目的:检测正常人与高血压病(EH)患者血浆内皮素、一气体氮的变化及葛根素对其的干预效应。方法:EH对照组口服苯磺酸氨氯地平5mg/d,或合和盐酸苯那普利10mg/d,每日一次,15d为一疗程。EH伍用治疗组同时合用5%GNS250ml+葛根素注射液400mg静滴,两组治疗前后检测血浆ET、NO水平变化。结果:EH各组血浆ET较正常人组均显著增高(P〈0.01),血浆NO水平及NO/ET比值除轻度E 相似文献
65.
66.
67.
We treated 51 patients with advanced malignant lymphoma refractory to conventional therapy with methyl-glyoxal-bis(guanylhydrazone) (methyl- GAG) at doses ranging from 400 to 800 mg/sq m. Therapy was started on a weekly schedule and was switched to every other week in responding patients at the onset of toxicity. Partial responses were observed in 6 of 13 evaluable patients with Hodgkin's disease (46%), 5 of 10 patients with diffuse poorly differentiated lymphocytic lymphoma (50%), 2 of 4 patients with nodular poorly differentiated lymphocytic lymphoma (50%), and 3 of 13 patients with diffuse histiocytic lymphoma (23%). Two of six patients with mycosis fungoides showed objective improvement in cutaneous disease. Toxicity was generally mild and included muscular weakness, myalgia, mucositis, and diarrhea; two patients developed bronchospasm following drug infusions. We conclude that methyl-GAG has major antitumor activity when administered on this schedule to patients with advanced malignant lymphoma. The low degree of toxicity, unique mechanism of action, and minimal myelosuppressive effects suggest that methyl-GAG will prove useful in future trials of combination chemotherapy regimens for the treatment of lymphoma. 相似文献
68.
Blood loss and replacement in total hip arthroplasty: a multicenter study. The Preoperative Autologous Blood Donation Study Group 总被引:1,自引:0,他引:1
To determine blood loss, the number of transfusions, and the hemoglobin levels achieved in patients via transfusion in the course of total hip arthroplasty, 324 patient records from 1987 through 1989 were reviewed at three university and three community hospitals. Calculated blood loss was 3.2 +/- 1.3 units in primary procedures and 4.0 +/- 2.1 units in revision procedures (mean +/- SD). Of 777 red cell units transfused, 455 (59%) were autologous units. Transfused patients received 2.0 +/- 1.8 units for primary procedures and 2.9 +/- 2.3 units for revision procedures (mean +/- SD). The maximum number of units given to 95 percent of the transfused patients was 4 for primary procedures and 6 for revision procedures. The mean postoperative hemoglobin level after all transfusions was 103 to 110 g per L, regardless of patient age group of physical status, autologous donor status, or hospital. No difference in length of hospital stay was observed for patients less than 65 years old with hemoglobin concentrations of 80 to 139 g per L at discharge. 相似文献
69.
70.
SJ Brink 《Acta paediatrica (Oslo, Norway : 1992)》1999,88(S427):14-24
Diabetic ketoacidosis (DKA) is a true pediatric and medical emergency. Diagnosis should be entertained and confirmed within 30 min of presentation. Any delay in making the diagnosis or instituting fluid and electrolyte correction is likely to increase morbidity and mortality. Slow and careful monitoring and correction of water, sodium and potassium levels should decrease DKA-associated problems with either continuous intravenous low-dose insulin or intramuscular insulin protocols designed to slowly bring the hyperglycemic and hyperosmotic state towards normal homeostasis. Special attention should be paid to potassium replenishment. Most patients do not require bicarbonate replacement. Cerebral edema, when it occurs, is associated with an approximately 50% morbidity and mortality; therefore, all attempts should be made at early recognition and prevention since treatment is less than ideal. Recurrent ketoacidosis is often related to omitted insulin and major psychosocial turmoil in the family, such as depression substance abuse, physical and/or sexual abuse. Prevention of recurrent DKA remains a major challenge for diabetologists and involves detailed assessment of family psychodynamics plus responsibility for home monitoring and insulin administration by a mature adult. Sick day guidelines should be taught and reviewed frequently in an effort to decrease ketoacidosis and metabolic decompensation during episodes of intercurrent illness. □ Cerebral edema, diabetic ketoacidosis, diabetes mellitus, DKA, sick day guidelines, sick day management, type 1 diabetes mellitus 相似文献