全文获取类型
收费全文 | 222084篇 |
免费 | 7443篇 |
国内免费 | 338篇 |
专业分类
耳鼻咽喉 | 5397篇 |
儿科学 | 6815篇 |
妇产科学 | 6991篇 |
基础医学 | 36281篇 |
口腔科学 | 4260篇 |
临床医学 | 15486篇 |
内科学 | 46713篇 |
皮肤病学 | 7329篇 |
神经病学 | 17981篇 |
特种医学 | 9024篇 |
外科学 | 35413篇 |
综合类 | 1367篇 |
现状与发展 | 1篇 |
一般理论 | 95篇 |
预防医学 | 10928篇 |
眼科学 | 7561篇 |
药学 | 10005篇 |
中国医学 | 141篇 |
肿瘤学 | 8077篇 |
出版年
2021年 | 2568篇 |
2020年 | 1518篇 |
2019年 | 2272篇 |
2018年 | 2857篇 |
2017年 | 2107篇 |
2016年 | 2270篇 |
2015年 | 5682篇 |
2014年 | 7346篇 |
2013年 | 9454篇 |
2012年 | 10393篇 |
2011年 | 10432篇 |
2010年 | 7768篇 |
2009年 | 7507篇 |
2008年 | 9392篇 |
2007年 | 9432篇 |
2006年 | 9516篇 |
2005年 | 8883篇 |
2004年 | 8048篇 |
2003年 | 6070篇 |
2002年 | 4351篇 |
2001年 | 1474篇 |
1999年 | 1595篇 |
1998年 | 2059篇 |
1997年 | 1903篇 |
1996年 | 2160篇 |
1995年 | 2304篇 |
1994年 | 2271篇 |
1993年 | 2145篇 |
1992年 | 2095篇 |
1991年 | 1785篇 |
1990年 | 1618篇 |
1989年 | 1464篇 |
1988年 | 1325篇 |
1987年 | 1362篇 |
1986年 | 1305篇 |
1984年 | 1274篇 |
1982年 | 1349篇 |
1978年 | 1270篇 |
1933年 | 1497篇 |
1932年 | 1488篇 |
1931年 | 1474篇 |
1930年 | 1659篇 |
1929年 | 1396篇 |
1928年 | 1548篇 |
1927年 | 1505篇 |
1926年 | 1587篇 |
1925年 | 1549篇 |
1924年 | 1615篇 |
1923年 | 1472篇 |
1922年 | 1447篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
Chest injuries can be sustained in isolation or in association with multiple injuries. Life-threatening complications may ensue because organs that are vital to survival of the organism are situated within the thoracic cavity. These complications include airway obstruction, tension pneumothorax, wide open pneumothorax, flail chest, cardiac tamponade and massive hemothorax. The mortality of patients hospitalized with chest injury can be as high as 10%. Clinical examination and awareness of the possibility of other injuries (high level of suspicion) are essential, and standard chest X-ray, ultrasound and thoracic computed tomography may also be needed for the diagnosis. The first part of this serial paper on the management of chest injuries focuses on anatomical aspects, pathophysiology and symptoms, but mainly on the indications for the standard diagnostic procedures and further high-tech examinations. 相似文献
22.
Prof. Dr. H. Delbrück 《Der Onkologe》2006,12(5):451-459
Rehabilitative and palliative measures in the follow-up care of pancreatic cancer patients will remain the dominant medical focus as long as potentially curative measures (recurrence prophylaxis, early detection and therapy of recurrence) have failed to show a significant survival benefit. Rehabilitative measures are possible for patients undergoing potentially curative as well as palliative treatment. Their aim is to alleviate the negative effects of the cancer and its therapy, not only physically, but also psychologically, socially and vocationally. The spectrum of possible somatic handicaps ranges from metabolic disorders, malnutrition and under-nutrition, as well as gastrointestinal symptoms to pain. Assistance in coping with illness, alleviating fears and depression and strengthening compliance are the main areas which are dealt with in psycho-oncology. Assessment of vocational fitness and the capacity to work depends on tumor location, whether R0 or R1 resection has taken place, the extent of pancreas resection, accompanying illnesses, whether or not adjuvant therapy has been given, and the physical condition of the patient 相似文献
23.
Conclusions Limitation of this analysis is participation of limited centers. Though all the regions of the country are represented total
number of procedures reported are less. Isolated CABG is commonest procedure performed in 2004. Congenital surgical procedures
are more than the valvular heart disease procedure. For appropriate categorization we need standard nomenclature for various
congenital surgical procedures. 相似文献
24.
25.
Prof. Dr. Doris Balogh 《European Surgery》1997,29(6):309-311
26.
27.
28.
Alexandros Karabetsos MD Dr ; George Karachalios MD Dr ; Paraskevoula Bourlinou RN Nurse ; Asimina Reppa RN Nurse ; Rozeta Koutri MD Dr ; Androniki Fotiadou MD Dr 《Headache》1997,37(1):12-14
The efficacy and safety of ketoprofen and paracetamol were compared for the treatment of acute migraine in a randomized, double-blind study of 64 patients. Thirty-four patients received ketoprofen 100 mg intramuscularly, and 30 patients received paracetamol 500 mg intramuscularly. Partial or complete relief of pain and other symptoms was achieved 15 to 20 minutes after administration in the ketoprofen group and within 35 minutes in the paracetamol group. Complete relief of pain was achieved within 30 to 40 minutes after ketoprofen in 28 patients (82.5%) compared to 5 patients (17.5%) in the paracetamol group. Six of the patients treated with ketoprofen needed a second dose for complete relief of pain during the 4-hour follow-up period. Side effects were rare and minimal. Our findings suggest that ketoprofen produced statistically significant benefit in the treatment of acute migraine. 相似文献
29.
30.
Dr. Michael Gosland Pharm.D. Dr. Bert Lum Pharm.D. Dr. Julia Schimmelpfennig Pharm.D. Dr. James Baker Pharm.D. Dr Michael Doukas M.D. 《Pharmacotherapy》1996,16(1):16-39
Cisplatin in combination with other cytotoxic agents is the backbone for a potential cure of testicular germ cell neoplasms and is a critical factor in the substantial activity observed in the treatment of small cell lung cancer, bladder cancer, and ovarian germ cell tumors. Resistance to cisplatin at the onset of treatment or at relapse limits its curative potential, however. Laboratory studies using both cells selected for cisplatin resistance by exposure to sublethal concentrations and biopsy specimens from patients' tumors provide insights for the potential mechanisms of resistance. The mechanisms identified in vitro include a complex and wide array of related and unrelated pathways such as alterations in cellular drug transport, enhanced DNA repair dependent and independent of signal transduction pathways, and enhanced intracellular detoxification such as glutathione and metallothionein systems. Studies of these mechanisms have identified a number of agents with known potential for administration to humans and that reverse cisplatin resistance in vitro; for example, reversal of cellular accumulation defects by dipyridamole; inhibition of DNA repair by hydroxyurea, pentoxifylline, and novobiocin; inhibition of the glutathione system by ethacrynic acid and buthionine sulfoximine; and inhibition of signal transduction pathways by cyclosporine, tamoxifen, and calcium channel-blocking agents. Current phase I clinical trials are focusing on the most effective doses and schedules to administer these agents in combination with cisplatin. Initial uncontrolled trials in limited numbers of patients suggest that the addition of modulators of cisplatin has the potential to reverse resistance in patients previously failing therapy. Another promising avenue for circumventing cisplatin resistance is the development of noncross-resistant platinum analogs. 相似文献