全文获取类型
收费全文 | 275953篇 |
免费 | 25938篇 |
国内免费 | 7645篇 |
专业分类
耳鼻咽喉 | 3564篇 |
儿科学 | 4616篇 |
妇产科学 | 4079篇 |
基础医学 | 19554篇 |
口腔科学 | 7897篇 |
临床医学 | 26335篇 |
内科学 | 24584篇 |
皮肤病学 | 3039篇 |
神经病学 | 11743篇 |
特种医学 | 7089篇 |
外国民族医学 | 17篇 |
外科学 | 23230篇 |
综合类 | 49851篇 |
现状与发展 | 22篇 |
一般理论 | 46篇 |
预防医学 | 33724篇 |
眼科学 | 2453篇 |
药学 | 28097篇 |
576篇 | |
中国医学 | 48360篇 |
肿瘤学 | 10660篇 |
出版年
2024年 | 1442篇 |
2023年 | 5659篇 |
2022年 | 10526篇 |
2021年 | 13756篇 |
2020年 | 13588篇 |
2019年 | 13730篇 |
2018年 | 12222篇 |
2017年 | 11433篇 |
2016年 | 10566篇 |
2015年 | 9907篇 |
2014年 | 20304篇 |
2013年 | 19602篇 |
2012年 | 18193篇 |
2011年 | 19303篇 |
2010年 | 15546篇 |
2009年 | 13124篇 |
2008年 | 11845篇 |
2007年 | 12197篇 |
2006年 | 10161篇 |
2005年 | 8567篇 |
2004年 | 7036篇 |
2003年 | 6213篇 |
2002年 | 4839篇 |
2001年 | 4109篇 |
2000年 | 3543篇 |
1999年 | 2803篇 |
1998年 | 2228篇 |
1997年 | 1998篇 |
1996年 | 1644篇 |
1995年 | 1510篇 |
1994年 | 1363篇 |
1993年 | 1146篇 |
1992年 | 1073篇 |
1991年 | 992篇 |
1990年 | 830篇 |
1989年 | 785篇 |
1988年 | 717篇 |
1987年 | 650篇 |
1986年 | 581篇 |
1985年 | 1843篇 |
1984年 | 2107篇 |
1983年 | 1311篇 |
1982年 | 1740篇 |
1981年 | 1216篇 |
1980年 | 1044篇 |
1979年 | 917篇 |
1978年 | 744篇 |
1977年 | 565篇 |
1976年 | 702篇 |
1975年 | 483篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
【摘要】 目的 了解社区中老年人群的血脂、血糖现状水平,探讨其与性别和年龄的关系,为本地区心脑血管疾病、糖尿病等疾病的防治提供诊疗依据。方法 对我市38078名社区居民采集清晨空腹血清标本,检测血糖(GLU)、甘油三酯(TG)、总胆固醇(TC)、高密度脂蛋白胆固醇(HDL C)和低密度脂蛋白胆固醇(LDL C)的结果,并对其进行年龄、性别分组统计分析。结果 不同性别和年龄组间的血脂、血糖水平差异有统计学意义(P<005),74~89岁年龄组血脂、血糖总体水平高于其他各年龄组(P<005);女性血脂水平普遍高于男性(P<005)。结论 中老年人群血脂、血糖异常率高,应定期对中老年人进行血脂、血糖监测,开展宣传教育活动,提高自我保健意识,预防高血脂、高血糖的发生和发展。 相似文献
93.
Wei Zhang Zheng Li Feng-Qing Xu Ya-Shuo Ren Shuang-Wang Xu Tong-Sheng Wang 《Journal of Asian natural products research》2019,21(5):426-434
Two new 11-methoxyl substituted triterpenoids, named as mimengosides J (1) and K (2), along with seven known compounds, were isolated from the fruits of Buddleja lindleyana. Their structures were elucidated on the basis of spectroscopic analysis. In addition, the new ones were evaluated for protective effects against damage of SH-SY5Y cells induced by 1-methyl-4-phenylpyridinium ion (MPP+) and the results indicated that those may be one of the candidate compositions of Buddleja lindleyana for the treatment of neurodegenerative disease.
94.
95.
96.
O. Morris M. Fairclough J. Grigg C. Prenant A. McMahon 《Journal of labelled compounds & radiopharmaceuticals》2019,62(1):4-23
Affinity peptide and protein‐ (APP) based radiotracers are an increasingly popular class of radiotracer in positron emission tomography (PET), which was once dominated by the use of small molecule radiotracers. Radiolabelled monoclonal antibodies (mAbs) are important examples of APPs, yet a preference for smaller APPs, which exhibit fast pharmacokinetics and permit rapid PET aided diagnosis, has become apparent. 18F exhibits favourable physical characteristics for APP radiolabelling and has been described as an ideal PET radionuclide. Notwithstanding, 18F radiolabelling of APP is challenging, and this is echoed in the literature where a number of diverse approaches have been adopted. This review seeks to assess and compare the approaches taken to 18F APP radiolabelling with the intention of highlighting trends within this expanding field. Generic themes have emerged in the literature, namely the use of mild radiolabelling conditions, a preference of site‐specific methodologies with an impetus for short, automated procedures which produce high‐yielding [18F]APPs. 相似文献
97.
98.
《The Journal for Nurse Practitioners》2022,18(8):897-903
Low-income food pantry clients are unable to adhere to the diet and physical activity recommendations of the American Diabetes Association. The aim of the study is to test the feasibility of using a mobile phone app to improve diabetes medication adherence. Clients with uncontrolled type 2 diabetes were enrolled in a mobile phone app featuring 70 days of text message reminders and incentives. The app and the 4-item Morisky Medication Adherence Scale evaluated medication adherence. Clinically significant medication adherence of 93% was achieved with use of the app. Phone app use is feasible among urban low-income clients to improve medication adherence. 相似文献
99.
100.
《JACC: Cardiovascular Interventions》2022,15(7):741-750
ObjectivesThe aim of this study was to report 1-year clinical outcomes following commercial transcatheter left atrial appendage occlusion (LAAO) in the United States.BackgroundThe National Cardiovascular Data Registry LAAO Registry was initiated to meet a condition of Medicare coverage and allow the assessment of clinical outcomes. The 1-year rates of thromboembolic events after transcatheter LAAO in such a large cohort of “real-world” patients have not been previously reported.MethodsPatients entered into the National Cardiovascular Data Registry LAAO Registry for a Watchman procedure between January 1, 2016, and December 31, 2018, were included. The primary endpoint was ischemic stroke. Key secondary endpoints included the rate of ischemic stroke or systemic embolism, mortality, and major bleeding. Major bleeding was defined as any bleeding requiring hospitalization, and/or causing a decrease in hemoglobin level > 2g/dL, and/or requiring blood transfusion that was not hemorrhagic stroke. The Kaplan-Meier method was used for 1-year estimates of cumulative event rates.ResultsThe study population consisted of 36,681 patients. The mean age was 76.0 ± 8.1 years, the mean CHA2DS2-VASc score was 4.8 ± 1.5, and the mean HAS-BLED score was 3.0 ± 1.1. Prior stroke was present in 25.5%, clinically relevant bleeding in 69.5%, and intracranial bleeding in 11.9%. Median follow-up was 374 days (IQR: 212-425 days). The Kaplan-Meier–estimated 1-year rate of ischemic stroke was 1.53% (95% CI: 1.39%-1.69%), the rate of ischemic stroke or systemic embolism was 2.19% (95% CI: 2.01%-2.38%), and the rate of mortality was 8.52% (95% CI: 8.19%-8.87%). The 1-year estimated rate of major bleeding was 6.93% (95% CI: 6.65%-7.21%). Most bleeding events occurred between discharge and 45 days following the procedure.ConclusionsThis study characterizes important outcomes in a national cohort of patients undergoing transcatheter LAAO in the United States. Clinicians and patients can integrate these data in shared decision making when considering this therapy. 相似文献