全文获取类型
收费全文 | 1181198篇 |
免费 | 74896篇 |
国内免费 | 4233篇 |
专业分类
耳鼻咽喉 | 16501篇 |
儿科学 | 35947篇 |
妇产科学 | 30263篇 |
基础医学 | 177544篇 |
口腔科学 | 34471篇 |
临床医学 | 101199篇 |
内科学 | 226825篇 |
皮肤病学 | 27730篇 |
神经病学 | 86920篇 |
特种医学 | 45320篇 |
外国民族医学 | 181篇 |
外科学 | 180848篇 |
综合类 | 24858篇 |
现状与发展 | 3篇 |
一般理论 | 255篇 |
预防医学 | 73940篇 |
眼科学 | 28802篇 |
药学 | 91279篇 |
4篇 | |
中国医学 | 4666篇 |
肿瘤学 | 72771篇 |
出版年
2021年 | 8792篇 |
2019年 | 8911篇 |
2018年 | 14231篇 |
2017年 | 11049篇 |
2016年 | 12703篇 |
2015年 | 14196篇 |
2014年 | 18499篇 |
2013年 | 26523篇 |
2012年 | 36532篇 |
2011年 | 37246篇 |
2010年 | 22169篇 |
2009年 | 20310篇 |
2008年 | 34942篇 |
2007年 | 38017篇 |
2006年 | 38246篇 |
2005年 | 36483篇 |
2004年 | 35203篇 |
2003年 | 33856篇 |
2002年 | 32992篇 |
2001年 | 64324篇 |
2000年 | 65498篇 |
1999年 | 54239篇 |
1998年 | 13713篇 |
1997年 | 11420篇 |
1996年 | 11020篇 |
1995年 | 10257篇 |
1994年 | 9373篇 |
1993年 | 8638篇 |
1992年 | 38440篇 |
1991年 | 37388篇 |
1990年 | 36212篇 |
1989年 | 35724篇 |
1988年 | 32257篇 |
1987年 | 31281篇 |
1986年 | 29438篇 |
1985年 | 27499篇 |
1984年 | 19765篇 |
1983年 | 16535篇 |
1982年 | 8942篇 |
1979年 | 17591篇 |
1978年 | 12052篇 |
1977年 | 10257篇 |
1976年 | 9269篇 |
1975年 | 10677篇 |
1974年 | 12338篇 |
1973年 | 11726篇 |
1972年 | 11181篇 |
1971年 | 10616篇 |
1970年 | 10064篇 |
1969年 | 9428篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
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
63.
C G Arruda J M Aldrighi L A Bortolotto I N Alecrin J A F Ramires 《Gynecological endocrinology》2006,22(10):557-563
BACKGROUND: Arterial hypertension and postmenopausal reduction of estrogen levels may be involved in modifications of the stiffness of large arteries. OBJECTIVES: To evaluate the pulse-wave velocity (PWV) and indirectly the arterial stiffness in hypertensive postmenopausal women submitted to hormone therapy with estradiol alone or combined with norethisterone acetate. SUBJECTS: Forty-five hypertensive postmenopausal women were double-blindly, randomly assigned to three arms of treatment: placebo (group I); estradiol 2 mg/day (group II); or estradiol 2 mg/day and norethisterone acetate 1 mg/day (group III). METHODS: Arterial stiffness was assessed from PWV measurements of the common carotid and femoral arteries (CF-PWV) and the common carotid and radial arteries (CR-PWV) obtained using the automatic Complior(R) device, taken at baseline and after 12 weeks of treatment. RESULTS: After the 12-week treatment, values of CF-PWV and CR-PWV were not significantly different (p = 0.910 and p = 0.736, respectively) among the groups. Systolic blood pressure showed a positive correlation with CF-PWV in groups II and III (p = 0.02 and p < 0.001, respectively). CONCLUSIONS: PWV and arterial stiffness in postmenopausal hypertensive women did not reduce over a 12-week treatment with estradiol alone compared with the same period of treatment with estradiol combined with norethisterone acetate. 相似文献
64.
65.
G N J Tytgat 《Acta chirurgica. Supplement》2002,(587):77-81
A true comparison of long-term medical and surgical treatment in gastro-oesophageal reflux disease (GORD) is impossible as few studies have been carried out with adequate randomisation of the patients and long-term evaluation of quality of life. In general the control of the reflux symptoms is roughly equal with medical and surgical treatment. However, surgery can cause other symptoms such as dysphagia or non-specific epigastric discomfort or pain in some patients, which reduces the overall efficacy in controlling the symptoms. Based on a cost utility analysis, Heudebert et al. came to the conclusion that medical treatment was their preferred strategy for most patients with severe erosive oesophagitis. 相似文献
66.
J?rg Müller Klaus Seppi Nadia Stefanova Werner Poewe Irene Litvan Gregor K Wenning 《Movement disorders》2002,17(5):1041-1045
The frequency and pathophysiology of freezing of gait (FoG) in atypical parkinsonism is unknown. We analysed the frequency of FoG in postmortem-confirmed atypical parkinsonian disorders (APD) comprising corticobasal degeneration (CBD), dementia with Lewy bodies (DLB), multiple system atrophy (MSA), and progressive supranuclear palsy (PSP). Sixty-six patients with pathologically confirmed APD (CBD, n = 13; DLB, n = 14; MSA, n = 15; PSP, n = 24) formed the basis for a multicenter clinicopathological study. Clinical features at first and last clinical visit were abstracted from patient records on standardized forms following strict instructions. At the first visit (median 36 months after symptom onset), 24% of APD had FoG (CBD, 8%; DLB, 21%; PSP, 25%; MSA, 40%). Logistic regression analysis showed a significant association of FoG and urinary incontinence (P = 0.04) at first visit. At last visit, 47% of APD had FoG (CBD, 25%; PSP, 53%; DLB, 54%; MSA, 54%). Clinicopathological correlation based on routine postmortem examination failed to identify a consistent neuropathological substrate of FoG. This study demonstrates that (1) FoG is common in APD, and (2) urinary incontinence is significantly associated with FoG in these disorders. Whether FoG and urinary incontinence share similar neuropathological substrates remains to be determined by future studies. 相似文献
67.
68.
A. HAZIOT I. KATZ G. W. RONG X. Y. LIN J. SILVER & S. M. GOYERT 《Scandinavian journal of immunology》1997,46(3):242-245
Membrane-bound CD14 acts as a receptor for lipopolysaccharide (LPS) on monocytes/macrophages and neutrophils. Studies have suggested that the activation of monocytes/macrophages by the binding of LPS to membrane-bound CD14 may require the association of a signal-transducing molecule with membrane-bound CD14. The observation that non-CD14 expressing cells, such as endothelial cells, can nevertheless be activated by a complex of LPS and a soluble form of CD14 (sCD14) suggests that the receptor for this complex may be identical to the signal transducing molecule associated with membrane-bound CD14. The studies described show that two CD14-specific MoAb are able to block the LPS-induced activation of endothelial cells but do not affect the response of monocytes to LPS. This suggests that the interaction of the sCD14:LPS complex with endothelial cells is distinct from the interaction of membrane-bound CD14 with its putative signal-transducing molecule. 相似文献
69.
70.
summary The aetiology of denture stomatitis is not clear from the literature. Some studies show its aetiology as Candida albicans, while other reports point out the significance of microorganisms. In this study the existence of C. albicans and microorganisms was investigated in subjects with and without denture stomatitis. The results showed that a combination of C. albicans and microorganisms is more likely to be responsible for denture stomatitis. 相似文献