全文获取类型
收费全文 | 1706441篇 |
免费 | 140144篇 |
国内免费 | 8540篇 |
专业分类
耳鼻咽喉 | 22596篇 |
儿科学 | 54573篇 |
妇产科学 | 47161篇 |
基础医学 | 238220篇 |
口腔科学 | 49040篇 |
临床医学 | 154267篇 |
内科学 | 328295篇 |
皮肤病学 | 35677篇 |
神经病学 | 134544篇 |
特种医学 | 68749篇 |
外国民族医学 | 500篇 |
外科学 | 252801篇 |
综合类 | 61052篇 |
现状与发展 | 26篇 |
一般理论 | 551篇 |
预防医学 | 132681篇 |
眼科学 | 38780篇 |
药学 | 132565篇 |
86篇 | |
中国医学 | 9200篇 |
肿瘤学 | 93761篇 |
出版年
2018年 | 17151篇 |
2017年 | 14237篇 |
2016年 | 15544篇 |
2015年 | 19209篇 |
2014年 | 26101篇 |
2013年 | 37320篇 |
2012年 | 51209篇 |
2011年 | 53944篇 |
2010年 | 33607篇 |
2009年 | 31633篇 |
2008年 | 50263篇 |
2007年 | 52491篇 |
2006年 | 52768篇 |
2005年 | 50654篇 |
2004年 | 48795篇 |
2003年 | 47015篇 |
2002年 | 45088篇 |
2001年 | 78662篇 |
2000年 | 80619篇 |
1999年 | 67900篇 |
1998年 | 18590篇 |
1997年 | 17247篇 |
1996年 | 16921篇 |
1995年 | 16546篇 |
1994年 | 15524篇 |
1993年 | 14518篇 |
1992年 | 55727篇 |
1991年 | 54034篇 |
1990年 | 52780篇 |
1989年 | 51012篇 |
1988年 | 47367篇 |
1987年 | 46681篇 |
1986年 | 44377篇 |
1985年 | 42930篇 |
1984年 | 32088篇 |
1983年 | 27607篇 |
1982年 | 16169篇 |
1981年 | 14458篇 |
1979年 | 30485篇 |
1978年 | 21085篇 |
1977年 | 17772篇 |
1976年 | 16711篇 |
1975年 | 17582篇 |
1974年 | 21495篇 |
1973年 | 20685篇 |
1972年 | 18857篇 |
1971年 | 17780篇 |
1970年 | 16298篇 |
1969年 | 15273篇 |
1968年 | 13963篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
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
102.
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
103.
104.
105.
106.
107.
We report a case of cervical necrotizing fasciitis (CNF) in a female having uncontrolled type II diabetes mellitus. The patient was presented to us after 20 days of preliminary symptoms. The aetiology of microbial inoculation in subdermal tissue was not known. The isolate was Staphylococcus aureus. In spite of the delay in presentation, the patient was successfully treated with combined antimicrobial and surgical intervention. 相似文献
108.
T. Svara M. Gombac M. Vrecl P. Juntes R. Kostanjsek A. Pogacnik M. Pogacnik 《Transboundary and Emerging Diseases》2006,53(1):26-29
Clinicopathological and electron microscopical findings of eight cases of enzootic nasal adenocarcinoma of sheep, diagnosed solely in one big flock in Slovenia between years 2001 and 2003 are described. All affected sheep were female, their mean age was 4.5 ± 1.5 years and they either belonged to the Istrian pramenka breed (five sheep) or were crossbreeds (three sheep). Tumours that arose from the ethmoid area of the nasal cavity were unilateral in six cases (75%) and bilateral in two cases (25%). All tumours were classified as adenocarcinomas by histopathological examination and they displayed either a combination of tubular and papillary growth or less often solely tubular proliferation. No metastases were detected in regional lymph nodes, brain or other organs. Electron microscopical studies performed on the reprocessed paraffin‐embedded tissues revealed the presence of the virus‐like particles with an average diameter between 70 and 90 nm. 相似文献
109.
The influence of short‐term confinement and moderate exercise on tibia development was investigated in growing pigs (36–41 kg, 10 weeks at the beginning of the study). Animals were kept for 2 weeks either in individual crates of 0.8 m2 (‘confinement’, n = 4) or kept in groups of four animals in large crates of 5.6 m2 without (‘control’) or with additional exercise (30 min walking at 5 days/week; ‘exercise’). Bone density and morphological parameters were evaluated by computer tomography (CT). Periosteal apposition and longitudinal growth were determined after polychrome sequential labelling in weekly intervals. Cortical areas of the cross sections at the mid‐shaft and at 75% of the length of the bone measured distal to the carpus by CT were significantly correlated to each other (r = 0.70) and revealed a significant reduction in confined animals. This difference was explained by lower periosteal apposition rates in these animals compared with exercised and group‐housed pigs. Similarly longitudinal growth and the formation and calcification of spongiosa of the tibiae were inhibited by confinement. Thus, 2 weeks of confinement led to significant differences in bone growth and metabolism in young growing piglets when compared with animals with moderate activity. 相似文献
110.
Timothy Fountaine Christopher R P Lind Andrew J J Law 《Journal of clinical neuroscience》2006,13(4):497-501
A 72-year-old man presented with a short duration of symptoms relating to a right fronto-parietal glioblastoma and a family history of children with brain tumours. Analysis of the patient's family tree revealed that out of seven children, he had a living son with anaplastic astrocytoma, a daughter who had died with a glioblastoma, and a son who had died with a histologically undiagnosed intrinsic brain tumour. One niece was also thought to have died from a brain tumour. All of the other affected family members had onset in their third or fourth decades. Tissue was only available from two of the affected individuals, precluding familial genetic analysis at this stage. There is no clinical evidence to support a diagnosis of a multiple cancer or neurocutaneous syndrome in this family. In view of what is known about the genetics of familial glioma, it is interesting to note the clinical evidence of both 'primary' glioblastoma and anaplastic astrocytoma in the same kindred. 相似文献