全文获取类型
收费全文 | 3578326篇 |
免费 | 269062篇 |
国内免费 | 8712篇 |
专业分类
耳鼻咽喉 | 48940篇 |
儿科学 | 118653篇 |
妇产科学 | 99897篇 |
基础医学 | 503788篇 |
口腔科学 | 102214篇 |
临床医学 | 325534篇 |
内科学 | 697425篇 |
皮肤病学 | 82687篇 |
神经病学 | 294004篇 |
特种医学 | 139543篇 |
外国民族医学 | 1130篇 |
外科学 | 536357篇 |
综合类 | 79332篇 |
现状与发展 | 6篇 |
一般理论 | 1399篇 |
预防医学 | 278878篇 |
眼科学 | 81811篇 |
药学 | 265373篇 |
10篇 | |
中国医学 | 6970篇 |
肿瘤学 | 192149篇 |
出版年
2018年 | 37664篇 |
2017年 | 29171篇 |
2016年 | 33536篇 |
2015年 | 38154篇 |
2014年 | 52484篇 |
2013年 | 79554篇 |
2012年 | 105810篇 |
2011年 | 111825篇 |
2010年 | 67230篇 |
2009年 | 64429篇 |
2008年 | 105253篇 |
2007年 | 111524篇 |
2006年 | 113401篇 |
2005年 | 109212篇 |
2004年 | 106044篇 |
2003年 | 102111篇 |
2002年 | 98975篇 |
2001年 | 167457篇 |
2000年 | 172112篇 |
1999年 | 145640篇 |
1998年 | 42054篇 |
1997年 | 37583篇 |
1996年 | 37595篇 |
1995年 | 36509篇 |
1994年 | 33803篇 |
1993年 | 31755篇 |
1992年 | 116061篇 |
1991年 | 112637篇 |
1990年 | 109360篇 |
1989年 | 105936篇 |
1988年 | 97700篇 |
1987年 | 95980篇 |
1986年 | 90784篇 |
1985年 | 87035篇 |
1984年 | 65156篇 |
1983年 | 55691篇 |
1982年 | 33006篇 |
1981年 | 29653篇 |
1979年 | 59712篇 |
1978年 | 41883篇 |
1977年 | 35579篇 |
1976年 | 33168篇 |
1975年 | 35358篇 |
1974年 | 42348篇 |
1973年 | 40390篇 |
1972年 | 37744篇 |
1971年 | 35270篇 |
1970年 | 32489篇 |
1969年 | 31068篇 |
1968年 | 28394篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Poor results after surgery for bronchioloalveolar carcinoma. 总被引:2,自引:0,他引:2
R A M Damhuis P R Schütte O C M Varin P M van den Berg R Heinhuis P W Plaisier 《European journal of surgical oncology》2006,32(5):573-576
BACKGROUND: Bronchioloalveolar carcinoma (BAC) is suggested to be less aggressive than other types of lung cancer. To assess the option of treatment modification, actual outcome data were studied and compared with results for other types of lung cancer. METHOD: Retrospective analysis of all consecutive patients who underwent resection for stage I lung cancer in our hospital. For 18 BAC cases, histological specimens were re-evaluated and in three cases diagnosis was revised. RESULTS: In the period 1989 through 2000, 15 patients with BAC and 260 patients with other tumour types underwent surgery in our hospital. Five-year survival rates were 24 and 53%, respectively, (p = 0.01). CONCLUSIONS: Given the poor results after standard surgery, parenchyma-sparing operations do not seem justified in patients with invasive BAC. 相似文献
992.
Sandeep Gohar Devendra Desai Anand Joshi Anita Bhaduri Ramesh Deshpande C Balkrishna Mukesh Chawla Camila Rodrigues V R Joshi 《Indian journal of gastroenterology》2003,22(4):140-142
INTRODUCTION: Autoimmune hepatitis (AIH) is a well-defined entity in the West but there are sparse Indian data on this disease. AIM: To study the clinical profile and response to treatment of Indian patients with AIH. METHODS: This is a part retrospective and part prospective study of 50 patients (median age 48 years, range 11-82; 43 women) seen between 1995 to 2001, diagnosed to have AIH as per the revised scoring system. Clinical and laboratory profile, response to treatment, and complications of treatment were analyzed. RESULTS: AIH accounted for 6% of all patients with liver disease seen during the period. The presenting symptoms were gastrointestinal in 43 and non-gastrointestinal in 7, with median symptom duration of 6 months (range 2 weeks to 40 years). Forty patients (80%) had chronic liver disease. Associated illnesses were present in 28 patients. Twenty-six patients were classified as definite and the rest as probable AIH. Forty-nine patients had Type 1 AIH. Five patients had overlap syndrome. Forty-five patients (90%) received immunosuppressive therapy. Twelve of 18 patients receiving only prednisolone and 21 of 27 patients receiving prednisolone and azathioprine combination responded. Thirteen (26%) patients had therapy-related complications (infectious 5, non infectious 8) with two treatment-related deaths. CONCLUSION: Type 1 AIH was the predominant type of AIH. The majority of patients with AIH presented with chronic liver disease. There was good response to immunosuppressive therapy. Therapy-related complications occurred in one-fourth of patients. 相似文献
993.
Dr. R. Hinrichs L. Weber K. Scharffetter-Kochanek 《Der Hautarzt; Zeitschrift für Dermatologie, Venerologie, und verwandte Gebiete》2006,57(5):455-458
Ohne Zusammenfassung 相似文献
994.
995.
996.
R E Dales A Mehdizadeh S D Aaron K L Vandemheen J Clinch 《The European respiratory journal》2006,28(2):319-322
The aim of the present study was to explore differences in the clinical expression, clinical diagnoses and management of airway diseases in a primary-care setting. Patients aged >or=35 yrs who had ever smoked were enrolled when they presented for any reason to one of eight rural primary-care practices. Respiratory symptom questionnaires and spirometry were administered. In total, 1,034 patients had acceptable and reproducible spirometry, of whom 550 (53%) were males and 484 (47%) were females. Males smoked more than females (41.2 versus 29.2 pack-yrs) respectively, and were more likely to have a pre-bronchodilator forced expiratory volume in one second/forced vital capacity <0.70 at 22.4 versus 11.8%, respectively. However, more females than males reported breathlessness (51.0 versus 42.8%, respectively), a prior diagnosis compatible with airflow obstruction and taking respiratory medications (23.4 versus 14.9%, respectively). In conclusion, the current results suggest that females are more likely than males to report breathlessness and be prescribed respiratory medications independent of differences in the severity of airflow obstruction. 相似文献
997.
M Bernasconi P N Chhajed F Gambazzi L Bubendorf H Rasch S Kneifel M Tamm 《The European respiratory journal》2006,27(5):889-894
There are no data available combining transbronchial needle aspiration (TBNA) of mediastinal lymph nodes and positron emission tomography (PET) in the staging of nonsmall cell lung cancer (NSCLC). The aim of the current study was to determine if these two methods can enhance the negative predictive value of the individual modality alone, for a specific lymph node station, and if this integrated approach can reduce the number of mediastinoscopies. A total of 113 patients with enlarged mediastinal lymph nodes (> or = 1 cm), who underwent both TBNA and PET scanning, were included. In 51 patients, histopathology, confirmed by surgical lymph node dissection, was compared with PET results and TBNA. Sensitivity, specificity, positive predictive value, negative predictive value and accuracy to detect malignant lymphadenopathy was 68 (13/19), 89 (119/134), 46 (13/28), 95 (119/125) and 86% (132/152) for PET, respectively; 54% (6/11), 100 (53/53), 100 (6/6), 91 (53/58) and 92% (59/64), respectively for TBNA; and 100 (11/11), 94 (50/53), 79 (11/14), 100 (50/50) and 95 (61/64) for combined TBNA and PET, respectively. Combination of transbronchial needle aspiration and positron emission tomography has the potential to allow adequate mediastinal staging of nonsmall cell lung cancer with enlarged lymph nodes in most patients without the need for mediastinoscopy. 相似文献
998.
999.
1000.