全文获取类型
收费全文 | 4341085篇 |
免费 | 368561篇 |
国内免费 | 19918篇 |
专业分类
耳鼻咽喉 | 61596篇 |
儿科学 | 134140篇 |
妇产科学 | 112304篇 |
基础医学 | 659060篇 |
口腔科学 | 120056篇 |
临床医学 | 396689篇 |
内科学 | 781316篇 |
皮肤病学 | 104252篇 |
神经病学 | 367719篇 |
特种医学 | 173600篇 |
外国民族医学 | 912篇 |
外科学 | 657679篇 |
综合类 | 146817篇 |
现状与发展 | 36篇 |
一般理论 | 2578篇 |
预防医学 | 371333篇 |
眼科学 | 101251篇 |
药学 | 310198篇 |
140篇 | |
中国医学 | 19693篇 |
肿瘤学 | 208195篇 |
出版年
2021年 | 58950篇 |
2020年 | 38381篇 |
2019年 | 60096篇 |
2018年 | 74969篇 |
2017年 | 58278篇 |
2016年 | 63959篇 |
2015年 | 78764篇 |
2014年 | 114312篇 |
2013年 | 180728篇 |
2012年 | 124448篇 |
2011年 | 127386篇 |
2010年 | 129425篇 |
2009年 | 132051篇 |
2008年 | 113204篇 |
2007年 | 119265篇 |
2006年 | 128085篇 |
2005年 | 122207篇 |
2004年 | 121819篇 |
2003年 | 112122篇 |
2002年 | 102386篇 |
2001年 | 155626篇 |
2000年 | 151385篇 |
1999年 | 139892篇 |
1998年 | 71521篇 |
1997年 | 67987篇 |
1996年 | 65878篇 |
1995年 | 61701篇 |
1994年 | 55730篇 |
1993年 | 51763篇 |
1992年 | 103633篇 |
1991年 | 98999篇 |
1990年 | 94113篇 |
1989年 | 91754篇 |
1988年 | 85374篇 |
1987年 | 83830篇 |
1986年 | 79526篇 |
1985年 | 77956篇 |
1984年 | 65973篇 |
1983年 | 58900篇 |
1982年 | 48164篇 |
1981年 | 44916篇 |
1980年 | 42192篇 |
1979年 | 57829篇 |
1978年 | 47040篇 |
1977年 | 41609篇 |
1976年 | 38670篇 |
1975年 | 37856篇 |
1974年 | 42415篇 |
1973年 | 40548篇 |
1972年 | 38019篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
121.
122.
123.
Vasundhara Sridharan Yuichi Shoda Jaimee L. Heffner Jonathan Bricker 《Substance use & misuse》2019,54(7):1086-1095
Background: Lay belief systems about the malleability of human attributes have been shown to impact behavior change in multiple domains. Addiction mindset—i.e., beliefs about the permanence (vs. malleability) of addiction — may affect cigarette smokers’ ability to quit, but this has never been examined. Objectives: The aims of the present research were to develop a measure of addiction mindset (study 1) and examine its associations with various psychological aspects of quitting smoking (study 2). Methods: In Study 1, using factor analysis of current smokers’ and nonsmokers’ (n?=?600) responses to 22 items designed to measure addiction mindset, we developed a reliable six-item Addiction Mindset Scale (AMS). In Study 2, adult smokers (n?=?200) completed the AMS, and measures of a number of psychological processes related to smoking. Results: Higher scores on the AMS, indicative of the belief that addiction is malleable (referred to as a growth mindset), were positively and significantly associated with greater motivation to quit, greater commitment to quitting, greater self-efficacy to abstain, less attribution of failure to lack of ability to change addiction, and fewer self-reported barriers to cessation (all p’s < .05). Conclusions: The results of this study show a relationship between the beliefs about the permanence of addiction and psychological processes relevant to quitting smoking. The findings underscore the potential of future research exploring how addiction mindsets relate to successful smoking cessation as well as other types of addictive behavior and how they can be applied to change people’s behavior. 相似文献
124.
Stepanova E. S. Makarenkova L. M. Chistyakov V. V. Rybakov Yu. L. Gukasov V. M. Fedotcheva T. A. Parshin V. A. Votyakov V. A. Shimanovskii N. L. 《Pharmaceutical Chemistry Journal》2019,52(12):1016-1020
Pharmaceutical Chemistry Journal - An HPLC-MS method for simultaneous quantitative determination of a novel gestagenic pharmaceutical and two of its metabolites in rat and rabbit blood sera was... 相似文献
125.
126.
127.
Madan M. Rehani Emily R. Melick Raza M. Alvi Ruhani Doda Khera Salma Batool-Anwar Tomas G. Neilan Michael Bettmann 《European radiology》2020,30(4):1839-1846
To determine percent of patients without malignancy and ≤ 40 years of age with high cumulative radiation doses through recurrent CT exams and assess imaging appropriateness. From the cohort of patients who received cumulative effective dose (CED) of ≥ 100 mSv over a 5-year period, a sub-set was identified with non-malignant disease. The top 50 clinical indications leading to multiple CTs were determined. Clinical decision support (CDS) system scores were analyzed using a widely adopted standard of 1–3 (red) as “not usually appropriate,” 4–6 (yellow) “may or may not be appropriate,” and 7–9 (green) “usually appropriate.” Clinicians reviewed patient records to assess compliance with appropriate use criteria (AUC). 9.6% of patients in our series were with non-malignant conditions and 1.4% with age ≤ 40 years. CDS scores (rounded) were 2% red, 38% yellow, 27% green, and 33% unscored CTs. Clinical society guidelines for CT exams, wherever available, were followed in 87.5 to 100% of cases. AUCs were not available for several clinical indications as also referral guidelines for serial CT imaging. More than half of CT exams were unrelated to follow-up of a primary chronic disease. We are faced with a situation wherein patients in age ≤ 40 years require or are thought to require many CT exams over the course of a few years but the radiation risk creates concern. There is a fair number of conditions for which AUC are not available. Suggested solutions include development of CT scanners with lesser radiation dose and further development of appropriateness criteria. 相似文献
128.
声带运动障碍的病因和临床表现复杂多变,涉及多学科,从病因上分为神经源性和非神经源性。对于神经源性声带运动障碍的诊治,首先通过喉镜等检查明确有无声带运动障碍及严重程度,值得注意的是声带纵向张力变化障碍也属于运动障碍的范畴;然后采用喉肌电图(LEMG)检查进行定性分析,在确诊神经源性损伤后,进一步对神经损伤部位进行定位诊断并查找导致神经损伤的病因;同时根据喉部神经电生理评估结果,判断预后。最后综合上述的评估结果制定相应的治疗策略。 相似文献
129.
Die Onkologie - Die Corona-Pandemie hat in den letzten Monaten verdeutlicht, dass das Thema Sterblichkeit trotz erheblicher Fortschritte im Bereich der Hospiz- und Palliativversorgung zu... 相似文献
130.
Novozhilov A. V. Mindukshev I. V. Korf E. A. Krivchenko A. I. Goncharov N. V. 《Bulletin of experimental biology and medicine》2020,168(4):444-448
Bulletin of Experimental Biology and Medicine - Ammonium, an end-product of catabolism, in low doses can promote adaptation of metabolic pathways in erythrocytes under conditions of extreme... 相似文献