全文获取类型
收费全文 | 10752篇 |
免费 | 655篇 |
国内免费 | 20篇 |
专业分类
耳鼻咽喉 | 75篇 |
儿科学 | 253篇 |
妇产科学 | 184篇 |
基础医学 | 1488篇 |
口腔科学 | 405篇 |
临床医学 | 1133篇 |
内科学 | 2508篇 |
皮肤病学 | 126篇 |
神经病学 | 983篇 |
特种医学 | 323篇 |
外科学 | 1452篇 |
综合类 | 49篇 |
一般理论 | 4篇 |
预防医学 | 924篇 |
眼科学 | 144篇 |
药学 | 679篇 |
中国医学 | 5篇 |
肿瘤学 | 692篇 |
出版年
2023年 | 77篇 |
2021年 | 128篇 |
2020年 | 115篇 |
2019年 | 129篇 |
2018年 | 296篇 |
2017年 | 233篇 |
2016年 | 330篇 |
2015年 | 266篇 |
2014年 | 297篇 |
2013年 | 535篇 |
2012年 | 679篇 |
2011年 | 702篇 |
2010年 | 339篇 |
2009年 | 323篇 |
2008年 | 676篇 |
2007年 | 705篇 |
2006年 | 665篇 |
2005年 | 645篇 |
2004年 | 579篇 |
2003年 | 564篇 |
2002年 | 537篇 |
2001年 | 194篇 |
2000年 | 248篇 |
1999年 | 190篇 |
1998年 | 45篇 |
1997年 | 42篇 |
1995年 | 39篇 |
1994年 | 34篇 |
1992年 | 142篇 |
1991年 | 117篇 |
1990年 | 110篇 |
1989年 | 99篇 |
1988年 | 119篇 |
1987年 | 82篇 |
1986年 | 107篇 |
1985年 | 111篇 |
1984年 | 94篇 |
1983年 | 78篇 |
1982年 | 51篇 |
1981年 | 35篇 |
1980年 | 37篇 |
1979年 | 67篇 |
1978年 | 37篇 |
1977年 | 34篇 |
1974年 | 37篇 |
1973年 | 49篇 |
1972年 | 34篇 |
1971年 | 32篇 |
1970年 | 35篇 |
1966年 | 32篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
Bjørn T. Gjertsen Christopher J. Logothetis Timothy J. McDonnell 《Cancer metastasis reviews》1998,17(4):345-351
Many of the common molecular alterations associated with prostate cancer progression involve genes known to regulate cell death susceptibility. The significance of these molecular events is discussed in the context of developing and implementing new strategies designed to restore cell death susceptibility in prostate cancer cells and overcome therapeutic resistance. 相似文献
62.
63.
64.
Long-term follow-up of Helicobacter pylori eradication therapy in Vietnam: reinfection and clinical outcome 总被引:2,自引:0,他引:2
Wheeldon TU Hoang TT Phung DC Björkman A Granström M Sörberg M 《Alimentary pharmacology & therapeutics》2005,21(8):1047-1053
AIM: To assess the long-term Helicobacter pylori reinfection rates, as well as the clinical outcome in peptic ulcer disease patients in Vietnam. METHOD: At a 1-year evaluation of H. pylori eradication treatment in 226 peptic ulcer patients, long-term H. pylori status was assessed with serology and/or culture, peptic ulcer status by gastroscopy, and DNA-fingerprinting performed with random amplified polymorphic DNA and restriction fragment polymorphism. RESULT: Follow-up was performed a mean 11 months after the post-treatment evaluation on day 30 after beginning of treatment. The overall reinfection rate was 23.5%, with 58.8% of the strains being identical to the pre-treatment isolates and 41.2% being different. Peptic ulcer was found in 22.9% of the reinfected patients and in 6.3% of the non-reinfected. At the long-term follow-up of successful eradication cases, 89.8% of the patients were free of peptic ulcer disease. The corresponding result was 58.7% in patients in whom H. pylori eradication failed. CONCLUSION: Following successful H. pylori eradication, reinfection with H. pylori in patients in Vietnam was found to be higher than in industrialized countries but the long-term recurrence of peptic ulcer disease was still low. Helicobacter pylori eradication treatment is therefore of value also in developing countries as the rate of peptic ulcer disease was low at the 1-year follow-up. 相似文献
65.
66.
Claire Petit Benjamin Lacas Jean-Pierre Pignon Quynh Thu Le Vincent Grégoire Cai Grau Allan Hackshaw Björn Zackrisson Mahesh K B Parmar Ju-Whei Lee Maria Grazia Ghi Giuseppe Sanguineti Stéphane Temam Maurice Cheugoua-Zanetsie Brian O'Sullivan Marshall R Posner Everett E Vokes Juan J Cruz Hernandez L.P. Zhong 《The lancet oncology》2021,22(5):727-736
67.
OBJECTIVE: To describe mortality and morbidity of neonates born at <26 weeks' gestation in a contemporary population-based cohort. METHODS: We analyzed data of neonates born at <26 weeks between 1998 and 2003 in the Federal State of Hesse, Germany. Survival was calculated at 28 days and at discharge from hospital. RESULTS: Out of a total of 800 births, 572 infants were liveborn. Among those admitted for neonatal intensive care, 62.3% survived until day 28. Among the neonates followed until death or discharge, 59.6% were discharged home. Logistic regression analyses showed the following variables to be associated with an increased risk of death: Twins (Odds Ratio (OR) 3.7; 95% Confidence Interval (CI) 1.34-10.26), multiple birth >or=3 (OR 8.14; CI 1.23-53.86), intraventricular hemorrhage (IVH) >or=grade III (OR 4.79; CI 1.89-12.14), clinical risk index for babies score >15 (OR 2.9; CI 1.09-7.76), and a gestational age or=grade III and/or periventricular leukomalacia in 15%, and severe retinopathy of prematurity in 29.8%. CONCLUSIONS: This study provides outcome data derived from a contemporary population-based cohort. Mortality and complication rates remain high. 相似文献
68.
Geir Bjørklund 《Nutrition and cancer》2013,65(8):1357-1360
Adjuvant Nutritional Intervention in Cancer (ANICA) was a clinical study carried out in Denmark in the 1990s with 32 typical patients with breast cancer, aged 32–81 yr and classified high risk because of tumor spread to the lymph nodes. The patients received standard therapy for their breast cancer, but got from the start additionally an adjuvant therapy in form of a cocktail consisting of vitamin C (2,850 mg/day), vitamin E (2,500 IU/day), beta-carotene (32.5 IU/day), selenium (Se; 387 micrograms/day), various other vitamins and essential trace elements, essential fatty acids (1.2 g gamma-linolenic acid/day and 3.5 g omega-3 PUFAs/day), and coenzyme Q10 (CoQ10, 90 mg/day). The protocol was later changed, with reduction of the Se intake and more coenzyme Q10 than when the study was started. The average survival of high-risk breast patients in the study was 50% after 5 yr, whereas for low-risk breast cancer patients (without metastases in the axilla when treatment was started), the average survival was 90% after ten years. The main investigator died, and the final report from the ANICA study was therefore never written. However, the published preliminary results from the trial were very promising; it seems, therefore, important to follow-up this study. 相似文献
69.
70.
Axcrona K Vlatkovic L Hovland J Brennhovd B Kongsgaard U Giercksky KE 《Journal of robotic surgery》2012,6(1):81-83
We report the case of a 68-year-old man who had previously undergone heart transplantation and pelvic irradiation for Hodgkin’s lymphoma and who was under active surveillance for prostate cancer. In response to his increased prostate-specific antigen levels and elevated Gleason score, he was offered robot-assisted laparoscopic prostatectomy. 相似文献