全文获取类型
收费全文 | 2341708篇 |
免费 | 183866篇 |
国内免费 | 4505篇 |
专业分类
耳鼻咽喉 | 31850篇 |
儿科学 | 78844篇 |
妇产科学 | 66599篇 |
基础医学 | 336144篇 |
口腔科学 | 68687篇 |
临床医学 | 209648篇 |
内科学 | 452624篇 |
皮肤病学 | 51478篇 |
神经病学 | 189035篇 |
特种医学 | 92148篇 |
外国民族医学 | 753篇 |
外科学 | 353131篇 |
综合类 | 57794篇 |
现状与发展 | 3篇 |
一般理论 | 892篇 |
预防医学 | 183416篇 |
眼科学 | 54097篇 |
药学 | 173972篇 |
6篇 | |
中国医学 | 4461篇 |
肿瘤学 | 124497篇 |
出版年
2018年 | 22882篇 |
2016年 | 20103篇 |
2015年 | 23023篇 |
2014年 | 31688篇 |
2013年 | 48548篇 |
2012年 | 64918篇 |
2011年 | 68724篇 |
2010年 | 40919篇 |
2009年 | 38832篇 |
2008年 | 65347篇 |
2007年 | 69035篇 |
2006年 | 70128篇 |
2005年 | 67849篇 |
2004年 | 66625篇 |
2003年 | 63881篇 |
2002年 | 62248篇 |
2001年 | 107826篇 |
2000年 | 111369篇 |
1999年 | 94132篇 |
1998年 | 26223篇 |
1997年 | 23863篇 |
1996年 | 23644篇 |
1995年 | 23052篇 |
1994年 | 21619篇 |
1993年 | 20340篇 |
1992年 | 77202篇 |
1991年 | 75292篇 |
1990年 | 74014篇 |
1989年 | 71370篇 |
1988年 | 65858篇 |
1987年 | 65459篇 |
1986年 | 61809篇 |
1985年 | 59779篇 |
1984年 | 44952篇 |
1983年 | 38481篇 |
1982年 | 22817篇 |
1981年 | 20492篇 |
1980年 | 19186篇 |
1979年 | 42576篇 |
1978年 | 29995篇 |
1977年 | 25331篇 |
1976年 | 23854篇 |
1975年 | 25088篇 |
1974年 | 30680篇 |
1973年 | 29567篇 |
1972年 | 27125篇 |
1971年 | 25571篇 |
1970年 | 23553篇 |
1969年 | 22061篇 |
1968年 | 20259篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
Clinical decisions are often made with incomplete information, yet patient care decisions are made every day. Patients vary clinically, uncertainty exists in diagnostic and prognostic information, and many preventive and treatment alternatives have not been formally assessed for their effectiveness. Because scientific information will never answer all clinical questions, clinical decisions are partially based on probabilistic information.
This paper describes how to apply clinical decision making to diagnosing and managing dental caries and periodontal diseases. By using explicit information to quantify probabilities and outcomes, clinical decision making analyzes decisions made under uncertain conditions and the uncertain impact of clinical information.
Clinical decision making incorporates concepts for preventing, diagnosing and treating dental caries and periodontal diseases: risk assessment, evidence-based dentistry, and multiple oral health outcomes. This information can serve as a tool for clinicians to augment clinical judgment and expertise. 相似文献
This paper describes how to apply clinical decision making to diagnosing and managing dental caries and periodontal diseases. By using explicit information to quantify probabilities and outcomes, clinical decision making analyzes decisions made under uncertain conditions and the uncertain impact of clinical information.
Clinical decision making incorporates concepts for preventing, diagnosing and treating dental caries and periodontal diseases: risk assessment, evidence-based dentistry, and multiple oral health outcomes. This information can serve as a tool for clinicians to augment clinical judgment and expertise. 相似文献
82.
83.
84.
Tony R Cucuzzella Elva G Delport Nancy Kim Julie Marley Christine Pruitt Anton G Delport 《The spine journal》2006,6(4):364-369
BACKGROUND CONTEXT: Substantial variation exists regarding the use of sedation before interventional spine techniques. Patient preference should play an important role in decision making regarding the need for sedation. However, little is known about patients' anxiety levels before spinal injections and their perceptions about the necessity of sedation. PURPOSE: To determine patient perception for need for sedation before epidural steroid injections and zygapophyseal joint injections. STUDY DESIGN/SETTING: Survey of consecutive spinal injection patients in an outpatient spine center. PATIENT SAMPLE: 500 consecutive lumbar, thoracic, and cervical patients receiving spinal injections. OUTCOME MEASURES: A 12-item questionnaire assessing patients' perceived anxiety before to a spinal injection. METHODS: Subjects were given the questionnaire after their spinal injection. Percentages requesting sedation for a first and potential second procedure were assessed. Additionally, anxiety level and pain rating, location of injection, age, sex, and other medication use were analyzed to determine the effect on the request for sedation. RESULTS: 17% of patients questioned requested sedation before an injection, and 28% would request sedation if they were to have a second injection. CONCLUSIONS: Routine sedation before diagnostic and therapeutic injections is not necessary as the majority of patients would not request sedation before the procedure when given the option. However, in some patients sedation is indicated, and all patients would benefit from educational material on sedation before the injection. 相似文献
85.
86.
87.
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
88.
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
89.
90.