全文获取类型
收费全文 | 43715篇 |
免费 | 3112篇 |
国内免费 | 148篇 |
专业分类
耳鼻咽喉 | 465篇 |
儿科学 | 1396篇 |
妇产科学 | 1187篇 |
基础医学 | 6022篇 |
口腔科学 | 512篇 |
临床医学 | 6347篇 |
内科学 | 8451篇 |
皮肤病学 | 717篇 |
神经病学 | 4409篇 |
特种医学 | 843篇 |
外国民族医学 | 1篇 |
外科学 | 3539篇 |
综合类 | 794篇 |
一般理论 | 43篇 |
预防医学 | 5087篇 |
眼科学 | 893篇 |
药学 | 3044篇 |
中国医学 | 79篇 |
肿瘤学 | 3146篇 |
出版年
2023年 | 223篇 |
2022年 | 474篇 |
2021年 | 870篇 |
2020年 | 484篇 |
2019年 | 808篇 |
2018年 | 935篇 |
2017年 | 730篇 |
2016年 | 813篇 |
2015年 | 987篇 |
2014年 | 1330篇 |
2013年 | 2005篇 |
2012年 | 3060篇 |
2011年 | 3215篇 |
2010年 | 1624篇 |
2009年 | 1581篇 |
2008年 | 2872篇 |
2007年 | 3095篇 |
2006年 | 3167篇 |
2005年 | 3119篇 |
2004年 | 3036篇 |
2003年 | 2852篇 |
2002年 | 2640篇 |
2001年 | 400篇 |
2000年 | 300篇 |
1999年 | 396篇 |
1998年 | 495篇 |
1997年 | 427篇 |
1996年 | 390篇 |
1995年 | 375篇 |
1994年 | 283篇 |
1993年 | 302篇 |
1992年 | 245篇 |
1991年 | 235篇 |
1990年 | 202篇 |
1989年 | 198篇 |
1988年 | 211篇 |
1987年 | 175篇 |
1986年 | 140篇 |
1985年 | 166篇 |
1984年 | 203篇 |
1983年 | 192篇 |
1982年 | 238篇 |
1981年 | 179篇 |
1980年 | 188篇 |
1979年 | 115篇 |
1978年 | 112篇 |
1977年 | 116篇 |
1976年 | 92篇 |
1975年 | 77篇 |
1974年 | 82篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
62.
Elizabeth E. Epstein Barbara S. McCrady Linda S. Hirsch 《Alcoholism, clinical and experimental research》1997,21(3):547-556
Current knowledge about alcohol and marital functioning is limited by restrictive sample selection, inattention to the literature on individual-based alcoholic subtypes, and lack of research linking individual differences among alcoholics to marital functioning. The present study was designed to study marital functioning of alcoholics in light of current alcohol typologies. Subjects were part of a larger study on conjoint treatment of alcoholic males and their female partners. Four typologies—including Type 1/2, In-Home/Out-of-home, SteadyIEpisodic, and EarlyILate Onset—were tested for replicability and discriminant validity before linking them to marital functioning. Discriminant validity was found only for the Early (59%)-versus Late (41 %)-Onset typology; thus, further analyses linked only this typology with marital functioning. At baseline, Early-Onset couples reported more marital instability, and the females in these couples were more distressed. During treatment, Early-Onset couples reported higher daily marital satisfaction than Late-Onset couples. Regardless of age of onset, males reported higher marital satisfaction than their spouses during treatment, but their satisfaction did not increase during treatment. Female partners' marital satisfaction increased during treatment. Female partners of Late-Onset males reported particularly low marital satisfaction during treatment. Parsing the sample according to the early-/late-onset typology yielded different predictors of marital satisfaction for males and females within each subtype. For female partners of Early-Onset alcoholics, psychological distress unrelated to her pattner's drinking severity was most associated with her own marital satisfaction, whereas marital adjustment of female partners of Late-Onset alcoholics was most associated with the male's level of perceptual accuracy regarding her needs. This pattern was reversed for the males; marital adjustment of Early-Onset alcoholics was most associated with his partner's perceptual accuracy of his needs, whereas marital functioning of Late-Onset alcoholics was best accounted for by his own psychological distress. 相似文献
63.
Dr. Barbara McGee Hughes Pharm.D. Dr. Ralph E. Small Pharm.D. Dr. Douglas Brink Pharm.D. Dr. Norma D. McKenzie M.D. 《Pharmacotherapy》1997,17(1):113-120
Study Objective . To evaluate the effects of flurbiprofen therapy on the pharmacokinetics of lithium. Design . Placebo-controlled, single-blind, crossover study. Setting . University-affiliated hospital. Patients . Eleven healthy women with bipolar disorder. Interventions . The subjects received therapeutic doses of lithium administered as an immediate-release capsule every 12 hours. In addition, they received one placebo tablet every 12 hours during phase I and flurbiprofen 100 mg every 12 hours during phase II of the study. Measurements and Main Results . Steady-state pharmacokinetic parameters were measured for each phase. Lithium trough plasma concentration (Cmin) and area under the curve were statistically significantly increased (p<0.05) when patients received flurbiprofen. Flurbiprofen also caused decreases in lithium clearance and 24-hour lithium urine excretion, although the changes did not reach statistical significance. Clinically significant increases in Cmin appeared to be associated with a greater than 1000-μg/24 hour decrease in urinary excretion of prostaglandin E2. Conclusion . Patients with clinically normal renal function may experience an increase in lithium levels with the initiation of flurbiprofen therapy. 相似文献
64.
Regulation of Neutrophil Apoptosis by Tumor Necrosis Factor-alpha : Requirement for TNFR55 and TNFR75 for Induction of Apoptosis In Vitro 总被引:7,自引:2,他引:5
65.
Neonatal Sucking Behaviors 总被引:3,自引:0,他引:3
Neonatal sucking responses or behaviors have been of great interest to researchers and clinicians since the early 1800s. Since 1960, there has been a resurgence of interest in the objective study of sucking behaviors in both the psychological and medical literature. The studies have examined both nutritive and non-nutritive sucking measurements. Sucking behaviors have been studied to understand the development of the feeding mechanism as well as to track neurobehavioral development. The relationship between sucking behaviors and behavioral organization of the newborn are considered, along with a historical perspective of sucking measurements, relevant literature on nutritive sucking, physiologic correlates, differences in breast and bottle feeding patterns, non-nutritive sucking, and factors that modify sucking organization. Implications for nursing practice will be discussed. 相似文献
66.
A model for training the trainers of child care providers that employs Vygotsky's framework of the Zone of Proximal Development is described. This efficient training mechanism proposes mentoring relationships as a means to meet the developmental needs of experienced child care professionals and improve the quality of existing child care programs.The authors would like to thank Dr. Bille Thomas and the satellite resource center directors and staff members for their work on the project. 相似文献
67.
Gale Haradon Barbara Bascom Cristiana Dragomir Virginia Scripcaru 《Occupational therapy international》1994,1(4):250-260
Infants living in an orphanage (n = 22) in Romania were assessed on the Test of Sensory Functions in Infants (TSFI). Testing of the institutionalized infants was done before and 6 months after an enriched caregiver intervention program. Results showed significant changes in areas of reactivity to tactile deep pressure, visual-tactile integration, oculomotor control, reactivity to vestibular stimulation and total test responses. No significant changes occurred in the area of adaptive motor functions. Effects of sensory deprivation resulting from institutional settings and changes that can occur from enriched caregiver environments are discussed. 相似文献
68.
Enza-Maria Valente Anjum Misbahuddin Francesco Brancati Mark R Placzek Barbara Garavaglia Sergio Salvi Andrea Nemeth Charles Shaw-Smith Nardo Nardocci Anna-Rita Bentivoglio Alfredo Berardelli Roberto Eleopra Bruno Dallapiccola Thomas T Warner 《Movement disorders》2003,18(9):1047-1051
The epsilon-sarcoglycan gene (SGCE) on human chromosome 7q21 has been reported to be a major locus for inherited myoclonus-dystonia. Linkage to the SGCE locus has been detected in the majority of families tested, and mutations in the coding region have been found recently in families with autosomal dominant myoclonus-dystonia. To evaluate the relevance of SGCE in myoclonus-dystonia, we sequenced the entire coding region of the epsilon-sarcoglycan gene in 16 patients with either sporadic or familial myoclonus-dystonia. No mutations were found. This study suggests that epsilon-sarcoglycan does not play an important role in sporadic myoclonus-dystonia and supports genetic heterogeneity in familial cases. 相似文献
69.
Gerald F. Powell MD Barbara A. Bettes PhD 《Child psychiatry and human development》1992,22(3):185-198
A controversy exists regarding the classification of nonorganic failure to thrive within the psychiatric nomenclature. There are a number of DSM-III-R diagnoses that may be applied to NOFTT, including Reactive Attachment Disorder of Infancy (RADI) and Major Depressive Disorder (MDD). The behaviors characteristic of NOFTT are symptomatic of depression, and are similar to those exhibited by infants with anaclitic depression as well as those of the adult with depression. The correspondence of the behaviours of NOFTT and the DSM-III-R criteria for Major Depression are reviewed, as are the conceptual and therapeutic reasons to view NOFTT infants as suffering from Depression. 相似文献
70.
M.D.Robert R. Bahnson M.D.B. Simon Slasky M.D.Marc S. Ernstoff M.D.Barbara F. Banner 《Urology》1990,35(6)
The ultrasonographic characteristics of an epidermoid cyst of the testicle are presented. Since these, findings are similar to other published case reports, preoperative sonographic diagnosis of this lagon may be possible. 相似文献