全文获取类型
收费全文 | 78921篇 |
免费 | 41523篇 |
国内免费 | 4篇 |
专业分类
耳鼻咽喉 | 1523篇 |
儿科学 | 4325篇 |
妇产科学 | 614篇 |
基础医学 | 15621篇 |
口腔科学 | 5199篇 |
临床医学 | 13781篇 |
内科学 | 22887篇 |
皮肤病学 | 7474篇 |
神经病学 | 13347篇 |
特种医学 | 2183篇 |
外科学 | 13992篇 |
综合类 | 42篇 |
一般理论 | 22篇 |
预防医学 | 4490篇 |
眼科学 | 1257篇 |
药学 | 5590篇 |
中国医学 | 1008篇 |
肿瘤学 | 7093篇 |
出版年
2023年 | 57篇 |
2022年 | 59篇 |
2021年 | 1277篇 |
2020年 | 5107篇 |
2019年 | 10859篇 |
2018年 | 10120篇 |
2017年 | 11492篇 |
2016年 | 12139篇 |
2015年 | 11992篇 |
2014年 | 11883篇 |
2013年 | 12432篇 |
2012年 | 4175篇 |
2011年 | 4078篇 |
2010年 | 8973篇 |
2009年 | 5318篇 |
2008年 | 2117篇 |
2007年 | 982篇 |
2006年 | 999篇 |
2005年 | 774篇 |
2004年 | 770篇 |
2003年 | 734篇 |
2002年 | 856篇 |
2001年 | 808篇 |
2000年 | 706篇 |
1999年 | 301篇 |
1998年 | 122篇 |
1997年 | 115篇 |
1996年 | 124篇 |
1995年 | 104篇 |
1994年 | 130篇 |
1993年 | 87篇 |
1992年 | 64篇 |
1991年 | 69篇 |
1990年 | 66篇 |
1989年 | 37篇 |
1988年 | 37篇 |
1987年 | 40篇 |
1986年 | 41篇 |
1985年 | 51篇 |
1984年 | 48篇 |
1983年 | 40篇 |
1982年 | 31篇 |
1981年 | 33篇 |
1980年 | 26篇 |
1979年 | 25篇 |
1978年 | 14篇 |
1977年 | 16篇 |
1975年 | 11篇 |
1972年 | 13篇 |
1970年 | 13篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
Carol Horrigan SRN RCNT Dip N PGCEA RNT MSc Complementary Therapies Adviser Lecturer Simon Mills MA FNIMH Projects Co-ordinator 《Complementary Therapies in Medicine》1994,2(4)
The rubric complementary medicine covers a variety of approaches that may seem alike only in their being outside conventional care and training. We have asked experienced practitioners to present their own pieces of this jigsaw, realising that these clinical fragments, when seen together, create excitement but also confusion. Of course, this forum is not intended to be a comprehensive review of relevant complementary treatments, and often the individual apporaches to clinical problems will appear totally unrelated, while their apparent effectiveness stretches the biomedical model and conventional research methodology beyond their capacity. With this in mind, we intend that forthcoming articles and reviews will expand on the therapies themselves, and discuss the evidence supporting them. 相似文献
93.
94.
Rectus sheath haematoma is a well‐documented but unusual cause of acute abdomen. Combination of clinical features and appropriate radiological investigations can make for a prompt diagnosis. Most authors advocate conservative management and it has been reported that patients were directly discharged from the emergency department. We report a case of rectus sheath haematoma which progressed with clinical deterioration and necessitated surgical intervention for clot evacuation. Causes, physical signs, radiological features and classification of rectus sheath haematoma are discussed. It may be necessary to continue close clinical monitoring after diagnosis of rectus sheath haematoma. 相似文献
95.
Seong‐II BIN Shing‐Sheng WU Xiaofeng ZENG Alan MOORE Nicole FRANK 《International journal of rheumatic diseases》2007,10(3):190-197
Aim: The aim of the current study was to assess the efficacy, safety, and tolerability of lumiracoxib 200 mg once daily (o.d.) in relieving osteoarthritis (OA) knee pain in patients in China, Taiwan, and South Korea. Methods: Patients of either sex (aged ≥ 18 years) with symptomatic, primary OA of the knee for ≥ 3 months were eligible for inclusion if they had OA pain intensity of ≥ 40 mm (100 mm visual analogue scale [VAS]) in the target knee joint during the previous 24 h. Patients were required to undergo regular non‐steroidal anti‐inflammatory drug therapy for ≥ 6 weeks. After 3–7 days of screening, patients were randomized (1 : 1) to receive either lumiracoxib 200 mg o.d. or celecoxib 200 mg o.d. The primary efficacy comparison between the study groups was overall OA pain intensity (VAS) in the target knee after 6 weeks of treatment. Results: The mean overall OA pain intensity (VAS) in the target knee after 6 weeks decreased from 60.6 mm to 35.7 mm and 60.5 mm to 36.1 mm in the lumiracoxib and celecoxib groups, respectively. Both study groups showed similar results in terms of improvement in both patient's and physician's global assessment of disease activity and functional health status. The percentage of adverse events (AEs) in the lumiracoxib and celecoxib groups (40.3% and 37.9%, respectively) was similar, as was the proportion of treatment‐related AEs (21.0% and 18.2%, respectively). Conclusions: Lumiracoxib 200 mg o.d. provided effective and well‐tolerated pain relief similar to that achieved with celecoxib 200 mg o.d. in knee OA patients. 相似文献
96.
Antonio Z Gimeno‐García Adolfo Parra‐Blanco David Nicols‐Prez Cipriano Manzano‐Sanz Rafael Mndez‐Medina Enrique Quintero 《Digestive endoscopy》2006,18(2):144-146
Gastric mucormycosis involvement is a rare condition that usually occurs in inmunocompromised patients and frequently has a fatal outcome. We report the case of a 73‐year‐old woman admitted to the intensive care unit with severe bleeding after an acute pulmonary disease. Upper endoscopy disclosed wide and deep necrotic ulcers in the body and fundus of the stomach and greenish exudates with the antrum and the duodenum undamaged. Autopsy revealed an invasive mucormycosis and a severe atheromatosis. Several predisposing factors for mucormycosis infection have been reported until now. We postulate that ischemic gastritis could be a predisposing factor for colonization of zygomycete. 相似文献
97.
Grazyna Jasienska Anna Ziomkiewicz Inger Thune Susan F Lipson Peter T Ellison 《European journal of cancer prevention》2006,15(5):439-445
Variation in the risk of breast cancer observed among women and among populations may be explained by variation in lifetime exposure to estrogens. The suppressive effect of exercise on estradiol levels in women is well documented, but it is unknown whether habitual (i.e. typical daily) physical activity has a similar effect. Epidemiological data suggest that physical activity is one of the few modifiable factors capable of reducing the risk of breast cancer in women. We investigated whether variation in the amount of habitual activity corresponds to variation in estradiol levels in women of reproductive age. One hundred and thirty-nine regularly menstruating women 24-37 years of age collected daily saliva samples for one complete menstrual cycle and kept a daily log of physical activity. Saliva samples were analyzed for concentration of estradiol. We observed a negative relationship between habitual physical activity and salivary levels of estradiol. Mean estradiol was 21.1 pmol/l in the low, 17.9 pmol/l in the moderate and 16.6 pmol/l in the high activity group (all pairwise differences were statistically significant at P<0.009). A strong association exists between physical activity and levels of estradiol among women of reproductive age. A modern lifestyle, characterized by reduced physical activity, may therefore contribute to a rise in the levels of estradiol produced during menstrual cycles and thus to higher cumulative lifetime exposure to estradiol, resulting in a higher risk of breast cancer. 相似文献
98.
99.
Shaun E. Cowman Joseph R. Ferrari Matthew Liao‐Troth 《Journal of community psychology》2004,32(2):121-126
This study examined the relationship between psychological sense of community, social‐support networks, and care‐giver stress and satisfaction among firefighters. No significant gender differences were obtained, but zero‐order correlates demonstrated significant relationships among all four variables. In examining the mediating effects of social‐support satisfaction, partial mediation for psychological sense of community on care‐giver satisfaction was determined, as well as full mediation for psychological sense of community on care‐giver stress. Therefore, firefighters who are satisfied with the support they receive may experience less stress with their care giving than those who experience low levels of support satisfaction. Future studies should assess these relationships more extensively in other areas of civic responsibility among public‐service employees to delineate effective support avenues. © 2004 Wiley Periodicals, Inc. J Comm Psychol 32: 121–126, 2004. 相似文献
100.
K. K. Adamama‐Moraitou G. D. Brellou T. S. Rallis N. Zavros D. Pardali A. Dinopoulos I. Vlemmas 《Transboundary and Emerging Diseases》2006,53(2):81-84
A 3.5‐year‐old intact male American Pit Bull was presented because of urinary incontinence and dysuria. Constipation, followed by diarrhoea, ocular disturbances and finally regurgitation developed over the next 4 years. Autonomic dysfunction was evidenced by clinical presentation, as well as positive ophthalmic pilocarpine test and subnormal Schirmer tear test. Diagnosis, however, was established through histopathological and immunohistochemical examination. Lesions attributable to inflammatory degenerative neuropathy of the autonomic ganglia, which represents one of the various types of human autonomic failure, were detected. 相似文献