全文获取类型
收费全文 | 1263篇 |
免费 | 94篇 |
国内免费 | 22篇 |
专业分类
耳鼻咽喉 | 9篇 |
儿科学 | 86篇 |
妇产科学 | 13篇 |
基础医学 | 84篇 |
口腔科学 | 42篇 |
临床医学 | 112篇 |
内科学 | 289篇 |
皮肤病学 | 35篇 |
神经病学 | 25篇 |
特种医学 | 250篇 |
外科学 | 132篇 |
综合类 | 71篇 |
一般理论 | 1篇 |
预防医学 | 85篇 |
眼科学 | 6篇 |
药学 | 71篇 |
肿瘤学 | 68篇 |
出版年
2019年 | 5篇 |
2018年 | 11篇 |
2017年 | 9篇 |
2016年 | 16篇 |
2015年 | 15篇 |
2014年 | 27篇 |
2013年 | 14篇 |
2012年 | 23篇 |
2011年 | 35篇 |
2010年 | 32篇 |
2009年 | 33篇 |
2008年 | 40篇 |
2007年 | 38篇 |
2006年 | 40篇 |
2005年 | 32篇 |
2004年 | 31篇 |
2003年 | 34篇 |
2002年 | 28篇 |
2001年 | 32篇 |
2000年 | 22篇 |
1999年 | 27篇 |
1998年 | 48篇 |
1997年 | 50篇 |
1996年 | 48篇 |
1995年 | 40篇 |
1994年 | 28篇 |
1993年 | 40篇 |
1992年 | 40篇 |
1991年 | 31篇 |
1990年 | 37篇 |
1989年 | 36篇 |
1988年 | 38篇 |
1987年 | 51篇 |
1986年 | 35篇 |
1985年 | 27篇 |
1984年 | 16篇 |
1983年 | 18篇 |
1982年 | 22篇 |
1981年 | 22篇 |
1980年 | 25篇 |
1979年 | 19篇 |
1978年 | 11篇 |
1977年 | 14篇 |
1976年 | 27篇 |
1975年 | 18篇 |
1974年 | 5篇 |
1973年 | 6篇 |
1970年 | 5篇 |
1967年 | 5篇 |
1966年 | 5篇 |
排序方式: 共有1379条查询结果,搜索用时 15 毫秒
961.
962.
K.S. Tonkin G.J.S. Rustin F.J. Paradinas 《Clinical oncology (Royal College of Radiologists (Great Britain))》1990,2(6)
We report a patient who had non-epidermotropic T-cell infiltrates of the skin for 10 years prior to the development of a HTLV-l associated disseminated T-cell lymphoma. The presentation and initial course of the lymphoma were unusual and we believe this is the first report of such an association. We therefore feel that patients of Caribbean origin with non-Hodgkin's lymphoma should be tested for HTLV-l so that appropriate chemotherapy can be instituted at the outset in this poor prognosis group. 相似文献
963.
Effect of intravenous gammaglobulin on circulating and platelet-bound antibody in immune thrombocytopenia 总被引:2,自引:0,他引:2
Ten patients with idiopathic thrombocytopenic purpura (ITP) were studied before and following a rise in circulating platelets subsequent to infusions of intravenous gammaglobulin (400 mg/kg/day x 5 days). We quantitated the amount of circulating IgG capable of binding to normal donor platelets in vitro using an 125I-monoclonal anti-human IgG assay, as well as the amount of IgG associated with the patients' platelets before and following therapy. We found no evidence for a decrease in platelet-specific IgG antibodies in these patients undergoing an acute response to therapy. These data suggest that the short-term efficacy of intravenous gammaglobulin is due to effects other than a substantive reduction in platelet reactive antibodies, such as the alteration of IgG-coated platelet destruction. 相似文献
964.
965.
Results from ultrasonography, computed tomography (CT), scintigraphy, hepatic angiography, and magnetic resonance (MR) imaging were analyzed for five patients with surgically proved fibrolamellar hepatocellular carcinoma (FL-HCC)--a variant of hepatocellular carcinoma (HCC) that usually occurs in younger patients and has an improved prognosis and chance for curative resection. The radiologic findings were generally inconclusive for a differential diagnosis because the appearance of the lesions on the various imaging studies closely simulated that of either focal nodular hyperplasia, HCC, or metastases. CT and technetium-99m sulfur colloid scintigraphy were the most effective techniques for the workup of these lesions, but because they do not allow a definitive diagnosis, open biopsy is recommended for most lesions simulating focal nodular hyperplasia and HCC in younger patients. Although the current specificity of MR imaging in diagnosing liver lesions is low, further experience may permit more specific characterization of these lesions. 相似文献
966.
967.
968.
969.
970.
The vlue of epinephrine enhanced angiography in the preoperative distinction of isolated hamartoma (angiomyolipoma without stigma of tuberous sclerosis) from hypernephroma has been largely discounted in the past. The authors performed this procedure in 6 patients (4 with isolated hamartoma and 2 with tuberous sclerosis complex). Vasoconstriction of the tumor vessels in the isolated group suggested the benign nature of the hypervascular mass in all cases. Vasoconstriction stronger than that of normal parenchymal vessels suggested the diagnosis of isolated renal angiomyolipoma. This form of pharmacoangiography should be part of the routine preoperative workup of all solid renal masses. 相似文献