全文获取类型
收费全文 | 4169篇 |
免费 | 263篇 |
国内免费 | 14篇 |
专业分类
耳鼻咽喉 | 29篇 |
儿科学 | 107篇 |
妇产科学 | 78篇 |
基础医学 | 562篇 |
口腔科学 | 80篇 |
临床医学 | 427篇 |
内科学 | 962篇 |
皮肤病学 | 57篇 |
神经病学 | 530篇 |
特种医学 | 63篇 |
外国民族医学 | 1篇 |
外科学 | 423篇 |
综合类 | 39篇 |
一般理论 | 1篇 |
预防医学 | 387篇 |
眼科学 | 41篇 |
药学 | 265篇 |
中国医学 | 6篇 |
肿瘤学 | 388篇 |
出版年
2024年 | 10篇 |
2023年 | 48篇 |
2022年 | 104篇 |
2021年 | 167篇 |
2020年 | 95篇 |
2019年 | 131篇 |
2018年 | 146篇 |
2017年 | 95篇 |
2016年 | 118篇 |
2015年 | 124篇 |
2014年 | 194篇 |
2013年 | 198篇 |
2012年 | 337篇 |
2011年 | 332篇 |
2010年 | 159篇 |
2009年 | 182篇 |
2008年 | 234篇 |
2007年 | 258篇 |
2006年 | 254篇 |
2005年 | 191篇 |
2004年 | 202篇 |
2003年 | 204篇 |
2002年 | 177篇 |
2001年 | 29篇 |
2000年 | 35篇 |
1999年 | 32篇 |
1998年 | 27篇 |
1997年 | 29篇 |
1996年 | 20篇 |
1995年 | 18篇 |
1994年 | 19篇 |
1993年 | 17篇 |
1992年 | 13篇 |
1991年 | 12篇 |
1990年 | 9篇 |
1989年 | 8篇 |
1988年 | 13篇 |
1987年 | 16篇 |
1986年 | 10篇 |
1985年 | 15篇 |
1984年 | 13篇 |
1983年 | 9篇 |
1982年 | 8篇 |
1981年 | 11篇 |
1979年 | 9篇 |
1977年 | 10篇 |
1974年 | 10篇 |
1969年 | 15篇 |
1968年 | 13篇 |
1967年 | 9篇 |
排序方式: 共有4446条查询结果,搜索用时 15 毫秒
1.
2.
3.
INLANDER, CHARLES B., LEVIN, LOWELL B., AND WEINER, E.D. Medicine on Trial: The Appalling Story of Medical Ineptitude and the Arrogance that Overlooks It. 相似文献
4.
Christopher D Wells Russell I Heigh Virender K Sharma Michael D Crowell Suryakanth R Gurudu Jonathan A Leighton Nora Mattek David E Fleischer 《BMC gastroenterology》2007,7(1):19
Background
Many factors impacting cecal intubation rates have been examined in detail; however, little information exists regarding the effect of the timing of the procedure. We sought to examine any difference in cecal intubation rates between morning and afternoon colonoscopies and identify factors contributing to a discrepancy. 相似文献5.
Alex Y. Chang Z. Nora Tu Julia L. Smith Philip Bonomi Thomas J. Smith Peter H. Wiernik Ronald Blum 《Investigational new drugs》1995,13(2):137-141
Summary Fifty-five patients with metastatic non-small cell lung cancer (NSCLC) were entered into this phase II randomized study for evaluating three new agents: gallium nitrate, amonafide and teniposide. The patients had to have ECOG performance status 0 or 1, no prior chemotherapy, and adequate hematological, hepatic and renal functions. Forty-seven patients were eligible and evaluable. Fourteen were randomized to receive gallium nitrate, 18 to amonafide and 15 to teniposide. Seventy-four percent of eligible patients were male. The majority of patients (89%) had an ECOG performance status 1. ECOG grade 4 toxicity occurred twice in patients on gallium nitrate, seven times on amonafide and 18 times on teniposide. The cause of death was attributed to amonafide in one patient (from sepsis) and to teniposide in two patients (due to infection and leukopenia). There was no objective response in all the patients entered. The overall survival times ranged from 2 weeks to 156 weeks with a median of 23 weeks. There were no survival differences among the three treatment arms. We conclude that gallium nitrate, amonafide and teniposide are inactive in metastatic NSCLC and do not warrant any further testing in this disease.The contents of this study is solely the responsibility of the authors and does not necessarily represent the official views of the National Cancer Institute. 相似文献
6.
7.
8.
Blossom Christa Maree Stephan Nora Breen Diana Caine 《Journal of the International Neuropsychological Society》2006,12(6):884-895
Prosopagnosia is currently viewed within the constraints of two competing theories of face recognition, one highlighting the analysis of features, the other focusing on configural processing of the whole face. This study investigated the role of feature analysis versus whole face configural processing in the recognition of facial expression. A prosopagnosic patient, SC made expression decisions from whole and incomplete (eyes-only and mouth-only) faces where features had been obscured. SC was impaired at recognizing some (e.g., anger, sadness, and fear), but not all (e.g., happiness) emotional expressions from the whole face. Analyses of his performance on incomplete faces indicated that his recognition of some expressions actually improved relative to his performance on the whole face condition. We argue that in SC interference from damaged configural processes seem to override an intact ability to utilize part-based or local feature cues. 相似文献
9.
Thirty-eight patients with varying degrees of vaginal wall prolapse were operated on using the Neugebauer-Le Fort technique. Their ages ranged from 59 to 90 years. Grand multiparity (> 4) was relatively uncommon (26%). Symptoms were present for more than two years in over half of the women. Serious medical conditions requiring preoperative attention were present in 55% of patients. If the uterus was present, dilation and curettage (D&C) was performed prior to the operation. Intraoperative complications were virtually absent; however, minor postoperative complications occurred in 30% of the patients. None of these complications were related to surgery or altered discharge plans. There were no deaths. No recurrences of prolapse were reported among 30 patients who were followed. 相似文献
10.
Kazumasa Fujitani Jaffer A. Ajani Christopher H. Crane Barry W. Feig Peter W. Pisters Nora Janjan Garrett L. Walsh Stephen G. Swisher Ara A. Vaporciyan David Rice Angela Welch Jackie Baker Josephine Faust Paul F. Mansfield MD 《Annals of surgical oncology》2007,14(4):1305-1311
Background Significant tumor downstaging has been achieved in patients with localized gastric or gastroesophageal adenocarcinoma by induction
chemotherapy and preoperative chemoradiotherapy (CTX–CTXRT). However, the influence of CTX–CTXRT on operative morbidity and
mortality has not yet been clarified. The aim of the present study was to document the frequency and nature of morbidity and
mortality after surgery combined with CTX–CTXRT, and identify factors predictive of postoperative complications in patients
with localized gastric or gastroesophageal adenocarcinoma.
Methods A prospectively collected database on 71 consecutive patients who underwent CTX–CTXRT at M.D. Anderson Cancer Center between
January 1997 and August 2004 was reviewed. Postoperative morbidity and mortality were investigated, and risk factors for overall
complications were identified by multivariate logistic regression analysis.
Results Overall morbidity and mortality rates were 38.0% (27 patients) and 2.8% (2 patients), respectively. Age greater than 60 years
[relative risk 11.3 (95% confidence interval 2.50–50.6)] and body mass index (BMI) of 26 kg/m2 or above [relative risk 4.08 (95% confidence interval 1.08–15.4)] were significant risk factors for overall complications.
Conclusions CTX–CTXRT can be performed safely with an acceptable operative morbidity and a low operative mortality rate in patients with
gastric or gastroesophageal cancer, with careful consideration of added risk associated with age and obesity. 相似文献