全文获取类型
收费全文 | 342166篇 |
免费 | 22074篇 |
国内免费 | 7625篇 |
专业分类
耳鼻咽喉 | 4099篇 |
儿科学 | 9572篇 |
妇产科学 | 6623篇 |
基础医学 | 27523篇 |
口腔科学 | 7927篇 |
临床医学 | 37605篇 |
内科学 | 42773篇 |
皮肤病学 | 4576篇 |
神经病学 | 19932篇 |
特种医学 | 8089篇 |
外国民族医学 | 31篇 |
外科学 | 36914篇 |
综合类 | 51171篇 |
现状与发展 | 12篇 |
一般理论 | 29篇 |
预防医学 | 35034篇 |
眼科学 | 5293篇 |
药学 | 30211篇 |
383篇 | |
中国医学 | 30581篇 |
肿瘤学 | 13487篇 |
出版年
2023年 | 5474篇 |
2022年 | 9774篇 |
2021年 | 13342篇 |
2020年 | 12381篇 |
2019年 | 18123篇 |
2018年 | 15843篇 |
2017年 | 12763篇 |
2016年 | 10305篇 |
2015年 | 9613篇 |
2014年 | 19813篇 |
2013年 | 21372篇 |
2012年 | 18205篇 |
2011年 | 19707篇 |
2010年 | 15874篇 |
2009年 | 14548篇 |
2008年 | 14175篇 |
2007年 | 14634篇 |
2006年 | 12777篇 |
2005年 | 11090篇 |
2004年 | 9056篇 |
2003年 | 7976篇 |
2002年 | 6234篇 |
2001年 | 5599篇 |
2000年 | 4628篇 |
1999年 | 4025篇 |
1998年 | 3259篇 |
1997年 | 3113篇 |
1996年 | 2700篇 |
1995年 | 2607篇 |
1994年 | 2505篇 |
1993年 | 1992篇 |
1992年 | 2027篇 |
1991年 | 1752篇 |
1990年 | 1558篇 |
1989年 | 1385篇 |
1988年 | 1307篇 |
1987年 | 1141篇 |
1985年 | 3801篇 |
1984年 | 4811篇 |
1983年 | 3352篇 |
1982年 | 3815篇 |
1981年 | 3567篇 |
1980年 | 3160篇 |
1979年 | 2909篇 |
1978年 | 2537篇 |
1977年 | 1912篇 |
1976年 | 2151篇 |
1975年 | 1633篇 |
1974年 | 1429篇 |
1973年 | 1277篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
James R. Westphal 《International journal of mental health and addiction》2007,5(2):123-140
Introduction Recent reviews found problem gamblers are heterogeneous and recommended subtyping gamblers in treatment studies.
Objective Review factors (stage of change, preferred gambling activity, co-occurring disorder, and temporal instability of symptoms)
for subtyping by evaluating the evidence for their effects on gambling treatment.
Methods Literature review, evidence grading.
Results Evidence is limited that any of the reviewed factors affects gambling treatment. Substantial evidence from prospective studies
and other evidence from cross-sectional studies and the strong placebo response among pathological gamblers support the temporal
instability of gambling symptoms.
Conclusions Multiple studies are needed to develop the evidence base needed to subtype gamblers in treatment. Changes in the diagnostic
criteria of pathological gambling may be necessary, especially to specify the persistence of gambling-related symptoms. 相似文献
52.
Yasuyuki Suzuki Kazuyuki Daitoku Masahito Minakawa Kozo Fukui Ikuo Fukuda 《The Japanese Journal of Thoracic and Cardiovascular Surgery》2006,54(1):44-46
We report the case of a 4-year-old girl who had quadricuspid aortic valve regurgitation with tetralogy of Fallot and pulmonary
atresia. This combination is very uncommon. Aortic valve replacement was performed successfully due to aortic regurgitation
which had progressed one year after the total repair. The dilated aortic annulus plus quadricuspid aortic valve may result
in progressive aortic regurgitation for a short period. 相似文献
53.
Michiel R. de Boer Jos Twisk Annette C. Moll Hennie J. M. Völker-Dieben Henrica C. W. de Vet Ger H. M. B. van Rens 《Ophthalmic & physiological optics》2006,26(6):535-544
Consecutive patients (n = 215) who were referred to optometric (55%) or multidisciplinary (45%) low-vision services and above 50 years of age were recruited from four hospitals in the Netherlands. They completed two vision-related quality of life questionnaires, the Vision Quality of Life Core Measure (VCM1) and the Low Vision Quality of Life Questionnaire (LVQOL), before their first visit with low-vision services and 1 year later. At follow-up, patients referred to multidisciplinary low-vision services had lower scores on the mobility subscale of the LVQOL than patients referred to optometric low-vision services [5.3 points; 95% confidence interval (CI): 0.2-10.5]. Paired sample t-tests for the two groups of patients taken together show improvement for the VCM1 (3.1 points; 95% CI: 0.6-5.6) and deterioration for the basic aspects of vision (3.5 points; 95% CI: 1.1-5.9) and the mobility (6.6 points; 95% CI: 3.7-9.5) subscales of the LVQOL. In conclusion, people referred to optometric services showed less deterioration in mobility than those referred to multidisciplinary services. No differences were observed for any of the other subscales of the LVQOL and the VCM1. Future research in this field should include randomized controlled designs comparing low-vision services with no treatment or placebo. 相似文献
54.
慢性肺心病哮喘持续状态218例临床分析 总被引:1,自引:0,他引:1
目的探索治疗慢性肺心病哮喘持续状态的方法。方法回顾性分析1983年10月~2005年3月收治的218例慢性肺心病哮喘持续状态患者的临床资料。结果哮喘持续状态在48h以内被控制的62例(28.4%);在72h以内控制的56例(25.7%);在120h以内控制的25例(11.5%);在168h以内控制的34例(15.6%);痊愈出院177例(81.2%);死亡41例(18.8%)。结论(1)治疗慢性肺心病哮喘持续状态.根据患者的病理变化.综合治疗.效果显著。(2)在治疗过程中.要恰当选择抗生素和平喘药;对那些血液黏滞度增高的患者.要加用血液稀释疗法。(3)测定血液黏滞度和氧饱和度.可以指导治疗、估计预后.应当列为常规检查。 相似文献
55.
应用秩和比法研究门诊人数增长与门诊医疗质量因子的关系 总被引:3,自引:0,他引:3
目的研究医院门诊人数增长与门诊医疗质量因子的关系,找出影响门诊人数增长的主要门诊医疗质量因子。方法利用秩和比法对实例进行分析。结果影响门诊人数增长的门诊质量因子,首先是高中级职称比(χ2=32.43,P<0.05),其次是副高以上职称的坐诊工时比(χ2=31.91,P<0.05),再次是新技术项目或重大改革(χ2=28.54,P>0.05)。结论研究医院门诊人数增长与门诊医疗质量因子的关系时,秩和比法有应用推广的价值。 相似文献
56.
粉防己碱对野百合碱致大鼠肺动脉构形重建的逆转作用 总被引:2,自引:0,他引:2
以野百合碱复制Wistar大鼠肺动脉高压模型,用特殊染色方法观察粉防已碱对野百合碱致大鼠肺动脉构形重建的逆转作用,结果表明粉防已碱可选择性的降低野百合碱诱导的大鼠肺动脉高压的作用,并明显地逆转肺血管及肺组织损伤,降低肺动脉高压和右心室肥大,对体循环压力无影响 相似文献
57.
58.
We report the case of a thoracic epidural hematoma at the T7-T9 level which occurred after placement of spinal epidural catheter for continuous anaesthesia in acute pancreatitis. The male patient felt a sudden back pain after six days of successful analgesia and became paraplegic 24 hours afterwards. An emergency laminectomy and removal of the hematoma were performed; however, the patient recovered only incompletely.We discuss the clinical signs and symptoms of spinal epidural hematoma as well as its diagnostics and therapy. The controversial views from the literature concernings its etiology are critically reviewed. 相似文献
59.
Sarah A. Taylor Jacqueline Benedetti David Schuller Stephen P. Richman Goronwy O. Broun Alexander Hantel 《Investigational new drugs》1993,11(2-3):227-229
Summary Twenty-two patients with recurrent or metastatic squamous cell carcinoma of the head and neck were treated with piroxantrone 150 mg/m2 intravenously every 21 days. There were no objective responses. The 95% upper confidence bound for response is 15%. Primary toxicity was hematologic. 相似文献
60.
Jay Magaziner Eleanor M. Simonsick T. Michael Kashner J. Richard Hebel 《Journal of clinical epidemiology》1988,41(11)
The present study evaluates the response comparability between 361 elderly hip fracture patients admitted from the community to seven Baltimore area hospitals between 1984 and 1986 and interviewer selected proxies on items pertaining to patients' pre-fracture health and functional status. Agreement across items ranges from very poor to good and varies with respect to the health or functional area assessed. Proxies tend to overestimate patient disability relative to the patients themselves, especially with regard to capacity to perform instrumental activities of daily living. Although proxies who report the greatest contact with patients respond most comparably to the patients, when they do disagree, proxies with the greatest patient contact tend to overestimate patient disability. The authors suggest that attention to item construction and phrasing may improve response comparability. 相似文献