全文获取类型
收费全文 | 54377篇 |
免费 | 4448篇 |
国内免费 | 2252篇 |
专业分类
耳鼻咽喉 | 544篇 |
儿科学 | 684篇 |
妇产科学 | 467篇 |
基础医学 | 6436篇 |
口腔科学 | 1017篇 |
临床医学 | 6040篇 |
内科学 | 7043篇 |
皮肤病学 | 973篇 |
神经病学 | 2816篇 |
特种医学 | 2525篇 |
外国民族医学 | 5篇 |
外科学 | 5451篇 |
综合类 | 8431篇 |
现状与发展 | 11篇 |
一般理论 | 9篇 |
预防医学 | 4283篇 |
眼科学 | 1061篇 |
药学 | 6100篇 |
47篇 | |
中国医学 | 3484篇 |
肿瘤学 | 3650篇 |
出版年
2024年 | 207篇 |
2023年 | 745篇 |
2022年 | 1898篇 |
2021年 | 2412篇 |
2020年 | 1682篇 |
2019年 | 1354篇 |
2018年 | 1506篇 |
2017年 | 1456篇 |
2016年 | 1534篇 |
2015年 | 2343篇 |
2014年 | 2876篇 |
2013年 | 3435篇 |
2012年 | 4878篇 |
2011年 | 5013篇 |
2010年 | 3733篇 |
2009年 | 3093篇 |
2008年 | 3676篇 |
2007年 | 3450篇 |
2006年 | 3063篇 |
2005年 | 2600篇 |
2004年 | 1965篇 |
2003年 | 1662篇 |
2002年 | 1322篇 |
2001年 | 1102篇 |
2000年 | 997篇 |
1999年 | 665篇 |
1998年 | 275篇 |
1997年 | 247篇 |
1996年 | 191篇 |
1995年 | 169篇 |
1994年 | 158篇 |
1993年 | 110篇 |
1992年 | 165篇 |
1991年 | 179篇 |
1990年 | 145篇 |
1989年 | 109篇 |
1988年 | 92篇 |
1987年 | 83篇 |
1986年 | 76篇 |
1985年 | 51篇 |
1984年 | 34篇 |
1983年 | 41篇 |
1982年 | 32篇 |
1981年 | 21篇 |
1980年 | 21篇 |
1979年 | 32篇 |
1978年 | 18篇 |
1977年 | 16篇 |
1974年 | 17篇 |
1973年 | 13篇 |
排序方式: 共有10000条查询结果,搜索用时 11 毫秒
1.
蒙天才 《中国继续医学教育》2020,(14):159-160
目的研究左乙拉西坦治疗小儿癫痫的疗效以及对智力的影响。方法在本院2017年4月-2019年5月收治的小儿癫痫患儿中选取74例开展研究,按照随机数表法分两组观察组和对照组,观察组37例,对照组37例,对照组采用奥卡西平进行治疗,观察组采用左乙拉西坦进行治疗,对比观察组与对照组组的治疗总有效率和智力评分变化。结果观察组与对照组比较,观察组的治疗总有效率较高,智力评分明显较高,两项对比差异有统计学意义(P <0.05)。结论左乙拉西坦治疗小儿癫痫有较好的治疗效果,治疗总有效率较高,且对患儿的智力有明显的改善作用,在实际临床小儿癫痫的治疗中具有较高的运用价值。 相似文献
2.
H J Kim C H Kang Y T Kim S-W Sung J H Kim S M Lee C-G Yoo C-T Lee Y W Kim S K Han Y-S Shim J-J Yim 《The European respiratory journal》2006,28(3):576-580
Although surgical lung resection could improve prognosis in some patients with multidrug-resistant tuberculosis (MDR-TB), there are no reports on the optimal candidates for this surgery. The aim of the present study was to elucidate the prognostic factors for surgery in patients with MDR-TB. Patients who underwent lung resection for the treatment of MDR-TB between March 1993 and December 2004 were included in the present study. Treatment failure was defined as greater than or equal to two of the five cultures recorded in the final 12 months of treatment being positive, any one of the final three cultures being positive, or the patient having died during treatment. The variables that affected treatment outcomes were identified through univariate and multivariate logistic regression analysis. In total, 79 patients with MDR-TB were included in the present study. The treatment outcomes of 22 (27.8%) patients were classified as failure. A body mass index <18.5 kg x m(-2), primary resistance, resistance to ofloxacin and the presence of a cavitary lesion beyond the range of the surgical resection were associated with treatment failure. Low body mass index, primary resistance, resistance to ofloxacin and cavitary lesions beyond the range of resection are possible poor prognostic factors for surgical lung resection in multidrug-resistant tuberculosis patients. 相似文献
3.
Hyo-Chang Kim Seok-Gu Kang Pil-Woo Huh Do Sung Yoo Kyoung Suok Cho Dal Soo Kim 《Journal of clinical neuroscience》2007,14(11):1135-1139
Pituitary abscess is a rare and potentially lethal condition. Pituitary abscess in a pregnant woman has not been previously described. A 38-year-old pregnant woman (34 weeks gestation) with a pituitary mass complained of a progressive headache and sudden visual impairment. She was afebrile and had no inflammatory symptoms on admission. On MRI, the preoperative diagnosis was pituitary adenoma with sphenoid sinusitis. She underwent an uncomplicated transsphenoidal procedure for removal of the pituitary mass. The next day, labor commenced and a healthy preterm baby was delivered. Pathologic examination of the intrasellar mass showed polymorphonuclear cells, debris and no tumor cells. The sellar contents were cultured and Streptococcus viridans was grown. To our knowledge this is the first case of pituitary abscess reported during pregnancy. Although the patient was pregnant, the transsphenoidal approach was safe for the mother and the fetus. Surgical drainage and antibiotic therapy are required for the definitive treatment of this condition. 相似文献
4.
左顶叶黑色素瘤并视力受损一例 总被引:1,自引:0,他引:1
患者,女性,14岁,因视物模糊7d、头痛3d于2004年10月8日入院。查体:神志清,全身皮肤黏膜无黑色素瘤的斑痣。右眼视力50cm数指,左眼视为0.1,双眼底视神经萎缩,余颅神经检查未见异常。头颅CT及MRI:幕上下脑室系统轻度扩大。 相似文献
5.
Gerald S. Lipshutz Harish Mahanty Sandy Feng Ryutaro Hirose Peter G. Stock Sang-Mo Kang rew M. Posselt Chris E. Freise 《American journal of transplantation》2005,5(2):366-373
With the introduction of more potent immunosuppressive agents, rejection has decreased in simultaneous pancreas/kidney transplant (SPK) recipients. However, as a consequence, opportunistic infections have increased. The purpose of this report is to outline the course of SPK patients who developed polyomavirus-associated nephropathy (PVAN). A retrospective review of 146 consecutive SPK recipients from January 1, 1996 to December 31, 2002 was performed. Immunosuppression, rejection and development of PVAN were reviewed. Nine patients were identified. All received induction with either OKT3 or thymoglobulin. Immunosuppression included tacrolimus/cyclosporine, MMF/azathioprine and sirolimus/prednisone. Two patients were treated for kidney rejection prior to the diagnosis of PVAN. Time to diagnosis was an average of 359.3 days post-transplantation. Immunosuppression was decreased but five ultimately lost function. However, none developed pancreatic abnormalities as demonstrated by normal glucose and amylase. Two underwent renal retransplantation after PVAN diagnosis and both have normal kidney function. PVAN was the leading cause of renal loss in SPK patients in the first 2 years after transplantation and is a serious concern for SPK recipients. The pancreas, however, is spared from evidence of infection, and no pancreatic rejection occurred when immunosuppression was decreased. 相似文献
6.
7.
8.
Melissa Kang Diana Bernard Michael Booth Susan Quine Garth Alperstein Tim Usherwood David Bennett 《The British journal of general practice》2003,53(497):947-952
BACKGROUND: To adequately address the complex health needs of young people, their access to services, and the quality of services received, must be improved. AIMS: To explore the barriers to service provision for young people and to identify the training needs of primary healthcare service providers in New South Wales (NSW), Australia. DESIGN OF STUDY: A cross-sectional, qualitative study of the perspectives of a range of health service providers. SETTING: A range of primary healthcare organisations across NSW. METHODS: Samples of general practitioners (GPs), youth health workers, youth health coordinators, and community health centre staff were drawn from urban and rural clusters across NSW. Focus groups and interviews were used to identify barriers to service provision and the training needs of service providers. Data were tape recorded, transcribed, and analysed. RESULTS: Barriers to service provision among GPs and community health centre staff included inadequate time, flexibility, skills, and confidence in working with young people, and poor linkages with other relevant services. Training needs included better knowledge of and skills in adolescent health requirements, working with adolescents, and working with other services. Barriers to service provision for youth health workers and coordinators included lack of financial resources and infrastructure. There were few linkages between groups of service providers. CONCLUSION: Models of service provision that allow stronger linkages between service providers, sufficient time for consultation with young people, adequate training and support of health professionals, and flexibility of service provision, including outreach, should be explored and evaluated. 相似文献
9.
Tang Su-en唐素恩 Kang Ying-qu康映蕖Departments of Pathology Obstetrics Gynecology First Hospital. Beijing Medical University Beijing. 《中华医学杂志(英文版)》1986,99(6):464-469
Eight cases of malignant and 12 0f benign Bren-
ner tumor are reported, patient ages ranged 31
69 and 39-53 years. The malignant tumor was
bilateral in 6 0f 8 cases, and the benign in l of 12.
The greatest diameter of the malignant tumors
averaged around 11 cm, and the benign 10. Six of
the malignant Brenner tumor patients died, one was
lost to follow up, and one survived for 10 years.
Pathologic and microscopic findings were pre-
sented in some detail. Based on the analysis of the
association between the histologic features and type
of Mullerian epithelium, we believe that the so called
Brenner tumor is in effect a tumor arising from the
Mullerian epithelium with a tendency to differentiate
into vaginocervical type epithelium. 相似文献
10.
Yoon-Koo Kang 《Taehan Sohwagi Hakhoe chi》2004,43(6):380-382